I’m getting 404 when editing a post with hyperlink, what’s wrong?

Try these
– Have you checked your php error_log ?
– You have already tried disabling plugins and stuff, try changing the default theme and see if you still get this error
– Check the code for instances of save_post hook , if any, which might be causing trouble https://codex.wordpress.org/Plugin_API/Action_Reference/save_post
– turn on wp_debug, add a save_post hook to die after saving post and check the page for any errors

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