Error message

• Warning: Cannot modify header information - headers already sent by (output started at /usr/local/www/mto/includes/common.inc:2861) in drupal_send_headers() (line 1551 of /usr/local/www/mto/includes/bootstrap.inc).
• TypeError: count(): Argument #1 ($value) must be of type Countable|array, bool given in _filter_url() (line 1532 of /usr/local/www/mto/modules/filter/filter.module).