PHP mbstring package Your internal characater set is ISO-8859-1
Warning!

Setting mbstring.internal_encoding to UTF-8 in your php.ini file is recommended to insure accented and multi-byte characters function properly.

I didn't change anything and no idea where a php.ini file lives let alone why it's set to ISO instead of UTF.

Found gallery config but no idea how it changed. Reverted it back to UTF-8