Error message

• Notice: Trying to access array offset on value of type bool in custom_search_theme() (Zeile 705 von /home/inklusive-bibliothek-www/www/inklusive-bibliothek.at/sites/all/modules/custom_search/custom_search.module).
• Notice: Trying to access array offset on value of type bool in custom_search_theme() (line 705 of /home/inklusive-bibliothek-www/www/inklusive-bibliothek.at/sites/all/modules/custom_search/custom_search.module).