Welcome to the forum, nadin!
Have you already found a solution to your problem? If not, it would be helpful to have the log just before the the system has rebooted. As your attached reboot log shows that it happened on Sep 17 04:44:38
, you can either gather the log before the reboot with something like sudo journalctl --since="2024-09-17 04:00:00" --until="2024-09-17 04:44:38"
or you could use sudo journalctl -b <boot-number>
, where <boot-number> is 0 for the current boot, -1 for the last boot, -2 one before the last boot, etc.