Oha, wenn das stimmt…….von reddit
App habe ich schon probiert, den Rest möchte ich eigentlich nicht machen…..too risky…
I called Volvo's support today and asked them for help, they simply replied we are aware of the problem in the current software and we need to wait for the next software update to make the digital key work!!!
Reading through other posts here, I decided to try resetting everything:
* Delete my Volvo ID
* Reset the car completely
* Uninstall the app
* Set all of them again
This makes it possible to set the digital key up, using the app.
Setting it up from the infotainment system was still failing, even after resetting everything!
Hope this can help 
https://www.reddit.com/r/ex30/…digital_key_after_trying/