When I try to run the project in simulator, I get the error:
Failed to create plugin placeholder for /Users/zc/Library/Developer/Xcode/DerivedData/iPhoneHandheldACT-cwlfykavlwlqwlhbecjubziblyzi/Build/Products/Debug-iphonesimulator/iPhoneHandheldACT.app/PlugIns/CallerID.appex
The build is successful, but run gives me the error.
This happened after I started re-organising the files in my project.
I tried deleting the derived data, clean and restarting the Xcode but it didn't help.
Removing the CallerID.apex from the embed framework section in Build Settings fixed this error.