Installation Failed “Invalid argument” when trying to run Today application extension

Question

I added a vanilla Today Application Extension and run with the new scheme created by XCode.
After it finishes building (\"Build Succeeded\" pops up), it failed straight

Answer 1

Try this:

1. Quit Xcode
2. Clean out ~/Library/Developer/Xcode/DerivedData manually
3. rm -rf "$(getconf DARWIN_USER_CACHE_DIR)/org.llvm.clang/ModuleCache"
4. iOS Simulator > Reset Content and Settings