Can't reach web GUI

[Tuqui77]

Yesterday I finished configuring the proxmox install and started setting up a plex container, everything worked fine. The server stood ON the whole time.

Now, I can't reach the web UI, the title on the tab shows proxmox, the icon shows the proxmox icon, but the screen just stays black (proxmox black, if that makes sense). The connection doesn't time out or anything, and I can SSH in perfectly fine, and even my plex container is running fine, the only problem is the web UI.

I'll add some info I've seen requested on other threads:

root@Proxmox:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host noprefixroute
valid_lft forever preferred_lft forever
2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master vmbr0 state UP group default qlen 1000
link/ether fc:45:96:96:e6:ff brd ff:ff:ff:ff:ff:ff
altname enxfc459696e6ff
3: wlp2s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 7c:67:a2:41:ce:81 brd ff:ff:ff:ff:ff:ff
altname wlx7c67a241ce81
4: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether fc:45:96:96:e6:ff brd ff:ff:ff:ff:ff:ff
inet 192.168.100.100/24 scope global vmbr0
valid_lft forever preferred_lft forever
inet6 fe80::fe45:96ff:fe96:e6ff/64 scope link proto kernel_ll
valid_lft forever preferred_lft forever
5: veth100i0@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master fwbr100i0 state UP group default qlen 1000
link/ether fe:24:a6:57:9e:5f brd ff:ff:ff:ff:ff:ff link-netnsid 0
6: fwbr100i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether b6:e6:af:f8:25:c0 brd ff:ff:ff:ff:ff:ff
7: fwpr100p0@fwln100i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
link/ether aa:42:0c:7d:53:61 brd ff:ff:ff:ff:ff:ff
8: fwln100i0@fwpr100p0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master fwbr100i0 state UP group default qlen 1000
link/ether b6:e6:af:f8:25:c0 brd ff:ff:ff:ff:ff:ff

root@Proxmox:~# cat /etc/hosts
192.168.100.100 Proxmox.Server Proxmox

# The following lines are desirable for IPv6 capable hosts

::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts

root@Proxmox:~# cat /etc/hostname
Proxmox

Tried restarting the server and again, boots up normally, can SSH, container is active, no GUI.
Tried different browsers, same result.
Tried different computers, same result. Mine's connected via ethernet, same as server, the other one via wifi.
On my phone I can access the mobile GUI on the same address, log in and see the specs of the server.

 

[Tuqui77]

Tried apt update and apt full-upgrade, nothing happened.

FINALLY, reinstalling pve-manager and proxmox-widget-toolkit solved the issue.

apt install --reinstall pve-manager proxmox-widget-toolkit

Just in case someone googles their way to this post.