Djay Pro does not work with itunes due to fake DRM

I have been in contact with Algoriddim about this but they have no resolution. I am a professional DJ and use Djay Pro on a Macbook Pro which works fine. But my new iphone 8 will not function with the software as almost all the songs are ghosted and give an error message regarding DRM or claiming they are not downloaded from the cloud. Neither of these errors messages are correct. The software is obviously faulity with newer IOS or with newer iphones and those of us who use phones as back up will not be impressed. I am watching carefully for a competitors replacement.