Evaluate Rollouts: KeyError: 'success_rate'
After a successful submission the evaluator goes through the 3 stages (Build, Thruxton Gym Server and Rollouts) before failing on evaluate rollouts. I thought that maybe this was an issue with my submission but looking at the list of submissions I can see that others also get this error with the first occurring on 26th of Jan.
What causes this error and is there a way to avoid it?