It is often happening to me that the storyBoard does not connect with the ViewController class when starting the project, this is happening more and more often, I have already deleted the file and created a new one with the class as it should be ... but! something else happens ... the libraries do not recognize them, such as UserNotifications, AVfoundation etc etc ... it is not the first time, and in other Mac it also came to me to do the same, someone has happened to him ?? the solution is to close and create it again ... it is a bit annoying and then it becomes annoying.
I have already selected the file in manual mode but that does NOT work, and now it is automatic as you can see in the following photo as an example: 