Solved

Cannot do test runs.

Hi Sak,
I see the issue, please go to Drivers & Staff, click 'Change' next to your drivers then re-select them and press Save. Once you have done this the issue will resolve itself. It is unique to your account. I am investigating how this happened to you as this is a bug I fixed earlier this week.

UPDATE: The explanation is that you signed these contracts 2-3 weeks ago, so before the fix was applied. I'll run a manual fix over any contracts from the past month, so you shouldn't really need to do anything once I've done that. I will do that in the next 15 minutes or so.