Urgent: cPanel issues causing intermittent 500 errors after recent update, desperate for a fix!

i am completely stuck and need urgent help! we're offering 'Website Maintenance & cPanel Management Services' and after a recent system update, our own main site is experiencing intermittent 500 internal server errores. it feels like a major cPanel issue is at play, and honestly, i'm desperate for a fix. i've been trying to debug this for hours, checked apache logs, php error logs, even restarted services in WHM, but the errores keep popping up randomly. it's impacting our service credibility big time, and we can't afford this downtime. has anyone faced similar cPanel issues with 500 errores after an update? what else can i check or try? this whole thing is driving me nuts. thanks in advance!