I am experiencing this issue as well. Any updates on how to fix?
achristy@msicorp.com
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Here is what eventually happened:
After 4 hours, my internal testing group was suddenly added to the new build and the number of Invites was updated and when I opened the TestFlight app, the build was there. But I did not receive any emails or TestFlight or App Store Connect notifications telling me that the build was available.