Help Needed for 500 Internal Server Error on New Website

Hello Support Team,

Lately this new website https://cogbrawl.com show 500 internal server error  some times. The error keep occurs when i try to load others pages, So i think something went wrong. Already tested few things. my friend keep telling me to change the hosting ( i'm thinking about switching the hosting ). Could you please assist in diagnosing and resolving this error and thank you.