long time lurker first post lol developer here, but WordPress isnt my daily thing. A clients site broke after bumping the PHP version:

There has been a critical error on this website.
Learn more about troubleshooting WordPress.
the classic critical error page. their setup has around twenty plugins including a security plugin... i wanna find the exact cause instead of randomly deactivating things and hoping, what's the fastest way to see teh real PHP error? happy to post logs or teh plugin list if that helps narrow it down.
