@miroslaws8 — sorry to see you had this issue, and apologies for such a slow response time. I had been relying on the forum software to email me on new posts but it didn't! grr.
That error message is certainly not the most helpful! At least I should add a random negative integer like Apple does lol. I've traced the code and believe it was thrown because a process exited with an unexpected exit code, but with no stdError output. I've greatly improved the error message as follows:
"Process \(pid) returned exit code \(exitCode) but one of the following was expected: \(validCodes.joinedAsHumanFriendly()). The stdErr contained: \(errorMsg)"
So if you see it again, please do post it again.
Thanks @PercyDwn for your help in this thread. I'm sad to hear of you guys having to restart your Macs to get things started — I'm very keen for that to not ever be needed.
Overall, if restarting the computer worked, it sounds like a process was running that was blocking an Indigo service from starting. Unfortunately I've responded too late for logs to be useful (apologies again) but if it happens again, please let me know and if you're happy to send me your logs at that point, hopefully I can trace through and see what went wrong exactly.