404 errors when updating options in admin dashboard

Double check mod_security and ask hosting to check its logs. It can be configured to ignore .htaccess and obscure 404 in admin seems like something it does at times.

I had to ask my hosting to explicitly whitelist WP core files some files in mod_security on their end for everything to work properly.

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Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)