https://www.ccjdigital.com/starksy-robotics-wraps-nearly-10-... It's possible that they relied too much on remote assistance. Really hard to say what state their tech is in and what stage investors want to see before putting in cash.
I find this statement pretty disingenuous when Waymo is trying to tackle the part of the problem Starsky isn't able to solve with their own self-driving tech - driving without a human in the loop for the last mile.