How to continue testing in TestFlight after stopping
I installed an app via testflight.
Once done with it, I clicked Stop Testing
It disappeared from my list
I now want to test again. I've tried redeeming the code and it just tells me I've already opted in.
I just need to know how to undo the Stop Testing action.
Solution
Remove user from itunesconnect.apple.com and add / invite again. There is no direct way for a user to undo in case accidentally stopped testing from within Testflight app.