nginx 502 Bad gateway after rebooting on the whole server

Job ID: 33460917

Budget: $25 – $50 USD

the server has nginx error on two pages after I have rebooted the server on two web pages.

Need help to solve it.

You:
- Ubuntu 18.0
- Plesk Obsidian 18.0.34
- sysadmin experience (not developer)

Related categories: System Admin Linux Apache Nginx Debian