The problem is the following;
In file fergcorp_countdownTimer.php, the if statement has a problem; therefore the script dies.
Comment out the following lines (lines 376 to 379)
// if ( ( $this->deleteOneTimeEvents ) && ( $thisEvent <= new DateTime() ) && ( !$thisEvent->getTimeSince() ) ) {
// $thisEvent = NULL;
// }
// else{
and the closing bracket that is now too much. (Line 421 for me)
// }
cheers