Hello my Page doesn’t work anymore because of this:

Warning: Illegal string offset ‘css’ in C:UsersmichaLocal Sitestechnikerseiteapppublicwp-contentpluginselementorcorepage-assetsdata-managersbase.php on line 242

Warning: Illegal string offset ‘css’ in C:UsersmichaLocal Sitestechnikerseiteapppublicwp-contentpluginselementorcorepage-assetsdata-managersbase.php on line 246

Fatal error: Uncaught Error: Cannot use string offset as an array in C:UsersmichaLocal Sitestechnikerseiteapppublicwp-contentpluginselementorcorepage-assetsdata-managersbase.php on line 246

Error: Cannot use string offset as an array in C:UsersmichaLocal Sitestechnikerseiteapppublicwp-contentpluginselementorcorepage-assetsdata-managersbase.php on line 246

thats what is in the line 241 -> 249:

    if ( ! isset( $assets_data[ $content_type ] ) ) {
        $assets_data[ $content_type ] = [];
    }

    if ( ! isset( $assets_data[ $content_type ][ $assets_category ] ) ) {
        $assets_data[ $content_type ][ $assets_category ] = [];
    }
    return $assets_data;
}

need help 🙁

I just need help……………….