Hello everyone, recently I Update my WordPress to 5.8 and also update my WordPress theme also, at the time of the update it works fine for me but from the last few days, I face an issue of Internal Server Error and sometimes it shows 503 Error , I do not know whats the issue, this also impact on my blog traffic and the ranking, please help if anyone have some know-how to resolve it.

You are in the wrong forum very obviously.