HELP! Apk won't build due to Photon error

My android APK for my gorilla tag game will build fine, I added photon, and it built fine, but when I actually setup photon it doesn’t build, and I’ve had to start over making my game 8 times, it wasn’t necessary to do that but I didn’t know how to fix it, if anyone knows how to fix the APK building. I’m not sure about the specific error, and I can’t check right now because I am at school, but if anyone knows how to fix it without knowing the specific error, that would be great, if not, I will give the specific error after school. Thank You!