It connected and most of the time it worked, then it suddenly didn’t if I remember correctly. I have since switched to self hosted redis and have had 0 problems since.
As for the stacktrace of the ShotsController - there were several:
https://sentry.io/share/issue/34f99d11e3cc4e9785a178e80f20e86b/
https://sentry.io/share/issue/8570bfac93ec4d18b8711c9d3316e18d/
https://sentry.io/share/issue/db96d05249164b99a6c16086e1e5fe28/
But all seemingly with the same underlying issue.
Anyway, as said, I’m now self hosting it and it’s working great. Maybe that should be the default suggestion for Rails apps?