[f11:101] SQL-Fehler: Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ci,COERCIBLE) for operation '='

Fatal error: Uncaught TypeError: mysqli_num_rows(): Argument #1 ($result) must be of type mysqli_result, string given in /homepages/18/d747909138/htdocs/seiten/req_popup_sup_show_uk_museen.php:111 Stack trace: #0 /homepages/18/d747909138/htdocs/seiten/req_popup_sup_show_uk_museen.php(111): mysqli_num_rows('nok : Illegal m...') #1 /homepages/18/d747909138/htdocs/popup_show.php(308): require('/homepages/18/d...') #2 {main} thrown in /homepages/18/d747909138/htdocs/seiten/req_popup_sup_show_uk_museen.php on line 111