How to display the_archive_title() and the_archive_description() – “weird” interaction

I’ve solved using the solution posted by @Quinn Commendant in the following thread: https://wordpress.stackexchange.com/a/203884/160016

In any case, the above behaviour is weird…

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