Failed to get descriptors for extensionBundleID

As mentioned here

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, setting *New Build System* in *File -> Workspace/Project settings* (for both *Shared* and *Per User* settings) seems to do the trick. You won't get rid of the warning, but the widget **might** (see notes) run.

Note 1 - even after this change, there seems to be about 30 % chance that it wont run. Just hit Run again 🤷‍♂️. (*Debug Navigator* stuck on *Waiting to Attach*)

Note 2 - sometimes this doesn't work altogether. Setting *Build System* to *Legacy* and back to *New* worked for me 🤦‍♂️.

Note 3 - running on device is so far without these problems (iOS 14 beta 7)

Tested on Xcode 12 beta v6.

Try to go to Setting -> General -> Profiles & Device Management -> Trust your cert,
and then rebuild and rerun app.

I resolved this problem.
Clean Builder Folder(maybe it's not necessary), then restart your iPhone. Run your project again.