Embedded Binary Bundle Identifier: (null)

Hi, I'm trying to build a Notification Service Extension. When I run the application, I get the error:

Embedded binary's bundle identifier is not prefixed with the parent app's bundle identifier.

Embedded Binary Bundle Identifier:(null)

Parent App Bundle Identifier: ##.#####.#####

I have no idea why the identifier of the embedded bundle could be null. In the General tab of the extension, I have set it so that it has a common prefix with the parent app. In the Info tab, the value for Bundle Identifier is $(PRODUCT_BUNDLE_IDENTIFIER), and I cannot change that to anything else. Whenever I build, it goes back to this.

Xcode Version 13.0

Any ideas?

Embedded Binary Bundle Identifier: (null)
 
 
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