I've met the same problem working on iOS Custom Notification Extension. The problem has appeared after trying to add App Group for this extension. I've got the message: Provisioning profile "iOS Team Provisioning Profile: myXXXXXXXExtension" doesn't match the entitlements file's value for the com.apple.security.application-groups entitlement. I've checked the entitlements file definition - it had correct definition of the group I've tried to add. After reading response of @nwpeakbagger in this thread I've checked "Bundle Identifier" value in Info.plist of this module. This value was absent as well as "Bundle display name" I've defined values for these attributes: "Bundle Identifier" = $(PRODUCT_BUNDLE_IDENTIFIER) "Bundle display name" = myXXXXXXXExtension The problem has been solved. Many thanks to @nwpeakbagger and Apple Dev Community!