In a comment in How to make localized questions on debugging on-topic?, I'm suggested that the standard process to debug is to:

disable all the plugins, switch to the default theme, then enable them 1 by 1 until the problem comes back, use WP_DEBUG, check PHP error logs

Would there be a canonical question about debugging generic errors, and duplicate future questions to it?

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    We might already have a doc for that, or it might be on .org, tbh that was just what I could think of off the top of my head. I hadn't considered asking a wide ranging "How to debug" Q to mark others as duplicates, though it would need a well defined scope else it'd be massively broad. How to setup basic XDebug/PHPStorm for example wouldn't fit on this stack, or how to configure PHP error logs in Nginx, it'd have to be WP specific
    – Tom J Nowell Mod
    Sep 27, 2019 at 18:03


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