Ok update 😄 I fixed it by using DevCleaner, cleaning the build, unpairing the iPhone and then switching it off. I switched it back on while plugged in and then Xcode no longer gave the above mentioned error. Hope it works for the work device too 🤞

Thanks for this excellent answer, it really helped. I was wondering is you could point to a good resource for learning about (iOS) these subjects like buffers, framecapacity, sample rate etc. I have seen a few answers like yours and I feel like it's a knowledge people with a computer science degree have had, but Apple doesn't really explain anywhere themselves. Any good reading material would be greatly appreciated. 🙂