looks like my NAS became unresponsive. I clicked on the stop to stop the backup and then I had to restart the NAS itself
Jul 10 05:33:32 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:33:42 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:33:52 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:34:03 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:34:12 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:34:22 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:34:33 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:34:42 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:34:53 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:35:03 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:35:12 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:35:23 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:35:32 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:35:43 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:35:53 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:36:03 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:36:12 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:36:22 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:36:33 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:36:42 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:36:53 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:37:02 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:37:13 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:37:22 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:37:33 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:37:43 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:37:52 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:38:03 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:38:12 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:38:17 pm02 pmxcfs[1911]: [status] notice: received log
Jul 10 05:38:17 pm02 sshd[17565]: Accepted publickey for root from 192.168.1.xx port 57672 ssh2: RSA
Jul 10 05:38:17 pm02 sshd[17565]: pam_unix(sshd:session): session opened for user root by (uid=0)
Jul 10 05:38:22 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:38:33 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:38:34 pm02 sshd[17565]: Received disconnect from 192.168.1.xx: 11: disconnected by user
Jul 10 05:38:34 pm02 sshd[17565]: pam_unix(sshd:session): session closed for user root
Jul 10 05:38:34 pm02 pmxcfs[1911]: [status] notice: received log
Jul 10 05:38:35 pm02 sshd[17616]: Accepted publickey for root from 192.168.1.xx port xxxxx ssh2: RSA xxx
Jul 10 05:38:35 pm02 sshd[17616]: pam_unix(sshd:session): session opened for user root by (uid=0)
Jul 10 05:38:42 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:38:52 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:39:02 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:39:12 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:39:23 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:39:33 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:39:42 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:39:52 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:40:03 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:40:12 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:40:22 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:40:33 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:40:42 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:40:52 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:41:03 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:41:13 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:41:22 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:41:33 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:41:39 pm02 sshd[17616]: Received disconnect from 192.168.1.xx: 11: disconnected by user
Jul 10 05:41:39 pm02 sshd[17616]: pam_unix(sshd:session): session closed for user root
Jul 10 05:41:42 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:41:53 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:42:03 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:42:12 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:42:22 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:42:32 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:42:42 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:42:52 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:43:02 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:43:13 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:43:22 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:43:32 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:43:43 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:43:53 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:44:02 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:44:13 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:44:23 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:44:32 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:44:42 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:44:52 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:45:03 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:45:12 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:45:23 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:45:32 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:45:43 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:45:52 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:46:03 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:46:12 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:46:22 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:46:33 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:46:42 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:46:53 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:47:02 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:47:12 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:47:22 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:47:32 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:47:43 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:47:52 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:48:02 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:48:12 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:48:22 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:48:33 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:48:42 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:48:53 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:49:02 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:49:12 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:49:23 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:49:32 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:49:33 pm02 smartd[1758]: Device: /dev/sda [SAT], SMART Usage Attribute: 190 Airflow_Temperature_Cel changed from 70 to 69
Jul 10 05:49:33 pm02 smartd[1758]: Device: /dev/sda [SAT], SMART Usage Attribute: 194 Temperature_Celsius changed from 30 to 31
Jul 10 05:49:42 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:49:52 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:50:03 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:50:12 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:50:22 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:50:33 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:50:42 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:50:52 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:51:03 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:51:12 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:51:23 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:51:32 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:51:43 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:51:52 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:52:02 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:52:13 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:52:22 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:52:33 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:52:42 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:52:53 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:53:03 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:53:12 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:53:22 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:53:32 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:53:42 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:53:52 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:54:03 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:54:12 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:54:22 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:54:32 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:54:42 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:54:52 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:55:02 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:55:13 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:55:22 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:55:32 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:55:43 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:55:52 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:56:02 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:56:12 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:56:22 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:56:23 pm02 pmxcfs[1911]: [status] notice: received log
Jul 10 05:56:33 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:56:42 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:56:52 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:57:02 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:57:13 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:57:22 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:57:32 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:57:43 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:57:52 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:58:03 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:58:12 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:58:23 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:58:32 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:58:43 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:58:52 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:59:03 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:59:13 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:59:23 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:59:32 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:59:42 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 05:59:52 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 06:00:02 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 06:00:12 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 06:00:22 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 06:00:33 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 06:00:42 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 06:00:52 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 06:01:02 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 06:01:12 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 06:01:23 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 06:01:32 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 06:01:43 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 06:01:52 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 06:02:03 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 06:02:12 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 06:02:23 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 06:02:32 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 06:02:40 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 06:02:50 pm02 pvestatd[2277]: storage 'Backups' is not online
Jul 10 06:03:21 pm02 systemd-timesyncd[1356]: interval/delta/delay/jitter/drift 2048s/-0.005s/0.034s/0.007s/+45ppm
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:53 pm02 kernel: nfs: server 192.168.1.23 OK
Jul 10 06:04:54 pm02 pvestatd[2277]: status update time (113.524 seconds)
Jul 10 06:04:58 pm02 vzdump[24562]: <root@pam> end task UPID
m02:00005FF3:04BC3D8D:596325F4:vzdump::root@pam: unexpected status
Jul 10 06:04:58 pm02 CRON[24560]: pam_unix(cron:session): session closed for user root
Jul 10 06:05:31 pm02 pmxcfs[1911]: [status] notice: received log