The iOS14 simulator does not start up

【Error Code】

Print: Entry, ":CFBundleIdentifier", Does Not Exist

[To be solved]

I want to start up an iOS simulator.

The actual device is iOS14 and I upgraded Xcode in order to build the actual device.As a result, the simulator doesn't work and I tried many things, but it didn't work, so I'd like to hear advice from someone who knows how to solve this problem or who has been in the same situation.

My environment.

npm 6.14.7

node 14.9.0

react 16.12.0

react-native 0.61.5

[What I tried]

・Remove IOS/build.

・Clear the pod cache.

・Check whether the port used by react-native is already in use.

・Quit the iOS simulator.

・Restart the PC.

・Build with Xcode (I couldn't)