Custom menu is rendered in all menus

I actually found the answer on stackexchange as well: https://wordpress.stackexchange.com/a/184149/132736

I need to replace the 'theme-location' by 'theme_location'. I simply misread the function reference on the WordPress codex.

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