500 internal server error after reboot

My server have applied 1.1.1 update some days ago without any problems. Yesterday i rebooted the server, and all my webpage domains did not response (Internal Server Error / Error Code 500).

Some clue, please ?

Moved this to a new topic, because it may not be related to the old one.

Infact that this happens after a reboot, it could be “all”, also you didnt give us any additional information like operating system and its version, logs and so on. Checkout the nginx service and the related log files, this will give you an idea what could went wrong.