DJM-Rec App not recording with Iphone 15 Pro / IOS 17

I have been using the DJM-REC App for the last year with an Iphone 12 Pro and it was working great. Just switched to an Iphone 15 Pro on IOS 17 and it does not record anymore of the DJM 900 Nexus. Can someone help ? Also how do I get a refund on the monthly fee if not compatible ?