Issue Gettting 502 Error [HELP]

[Emiliano]

I have a vps service in ovh with plesk and today I decided to expand it to a bigger plan to expand my disk space and ram memory, after that all my pages in ples got this error

this error entering the main ip

But if I could access my panel

Upon entering the panel I found this error in which I clicked

Then I got this error

I want to fix the 502 error