The 'check_mark_completion' cron task appears to have a code error.

When no records are returned to '$lmsviewed' it has the value 'false'.

When the code tries to use property 'timecreated' on '$lmsviewed' it throws an error since '$lmsviewed' is a boolean not an object.

Line 94
   //Check viewed and mark it.
   $lmsviewed = $DB->get_record('course_modules_viewed',
   ['coursemoduleid'=>$cm->id, 'userid'=>$gcrecord->userid]);
   if (empty($lmsviewed)) {
      $newviewed = new \stdClass();
      if (isset($gcrecord->timemodified) && $gcrecord->timemodified > 0) {          
      //Set timemodified from goone completion table.
$lmsviewed->timecreated = $gcrecord->timemodified;      
      } else {          
//Set timemodified as current timestamp as correct timemodified date not found.
$lmsviewed->timecreated = time();      
}

     $newviewed->timecreated = time();
     $newviewed->coursemoduleid = $cm->id;
     $newviewed->userid = $gcrecord->userid;
     $DB->insert_record('course_modules_viewed', $lmsviewed);
     goone_set_completion($cm, $gcrecord->userid, '', "completed");
   }