I had a problem playing the game because I recently installed the app spotify on my phone. The game did start but I had a black screen after the niantic logo appeared and couldn't do anything. I used the same google account for ingress and spotify
Thanks for reaching out, @Putzgecko! Please reinstall the app or log in using another device and check if that helps. Also, check out this link from our website for more insights on Supported devices.