How to Fix “There Has Been a Critical Error on Your Website” in WordPress
Critical errors on any system can be extremely frustrating. But if you’ve recently encountered the “There has been a critical error on your website” message on your WordPress site, don’t fret!
In many cases, critical errors are the result of conflicts in plugins, theme files, or PHP related issues. This is one of the most common errors WordPress administrators can encounter and there are a number of ways you can resolve it.
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Story added 12. January 2023, content source with full text you can find at link above.