I have installed an app successfully as an internal tester. Now the app is ready for external testing, and has passed Apple review. In the email received from Apple, I clicked the Open in TestFlight
button, which opened the TestFlight app and displayed the app details.
Clicking the INSTALL
button fails with the following alert:
Couldn't accept the invite
You've already accepted the invite for this app.
OK
The message does identify the problem. Any ideas how to resolve it?
Also make sure that you're not trying to install as internal tester while being added as an external tester in a previous build because this will for sure result in the same error. To resolve this problem simply log in to iTunes Connect and remove this account from the external testers list - then you should be able to install as internal tester without problem.