Pavlovia unexpected token error

URL of experiment:
https://run.pavlovia.org/urielias/farbrother_rankingquestions/

Description of the problem:
"
Successful sync at: 23:58:05, took 2.535s906606.3051 ERROR Line 176: Unexpected token in FarBro.js
906606.7226 ERROR Line 165: Unexpected token in FarBro-legacy-browsers.js
906610.4019 INFO Successful sync at: 23:58:05, took 2.535s
"
At initialization.

Both mentioned lines are:
QuestionClock = new util.Clock();
Which looks totally innocent…

What could it be?