Error message

• Notice: Trying to access array offset on value of type null in tb_megamenu_sync_config() (line 291 of /sites/thesmusgerman/www/web_main/sites/all/modules/tb_megamenu/tb_megamenu.functions.inc).
• Notice: Trying to access array offset on value of type null in tb_megamenu_sync_config() (line 312 of /sites/thesmusgerman/www/web_main/sites/all/modules/tb_megamenu/tb_megamenu.functions.inc).