Build 3660 was working fine. However, today I installed the newest Xcode version 13.1 (13A1030d). I had already been running with an earlier version of 13.1, but this one is specifically 13A1030d.
Whether I create a Dev or Distribution build, both result in the device reporting “Unable To Install xxxMyAppNamexxx”.
Problem is, I can’t build to update my apps now. The .ipa file uploads fine to TestFlight, too. And I still get this same error on my device when I attempt to install it from TestFlight or the Dev version through Xcode…
My hardware is MacBook Pro (13-inch, 2017, Four Thunderbolt 3 Ports), 3.3 GHz Dual-Core Intel Core i5, Memory: 16 GB 2133 MHz LPDDR3
This problem occurred running the latest version of macOS Monterey 12.1 Beta (21C5021h).
UPDATE
UPGRADING TO THE LATEST macOS Monterey version (21C5031D) released 2 days ago solved this problem with the DISTRIBUTION profile. But it is still BROKEN when creating a build with the DEVELOPMENT profile. Although the Build finishes, using Xcode to install it fails with the “Unable To Install…” message.