Error message

User warning: The following module is missing from the file system: announcements_feed. For information about how to fix this, see the documentation page. in _drupal_trigger_error_with_delayed_logging() (line 1156 of /home/dx0fxvv7c6p4/public_html/includes/bootstrap.inc).
8 + 11 =
Solve this simple math problem and enter the result. E.g. for 1+3, enter 4.