GFork

script error

this just randomly started happening - script is freezing with this error in console:

VM323688:1172 Uncaught RangeError: Unsupported time zone specified undefined

The problem is from here:

if (next) {
console.log("Next finished task at " + next.toLocaleString());
} else {
console.log("No next finishing date found!!");
}
return next;
}

this line:
console.log("Next finished task at " + next.toLocaleString());