This app was mentioned in 2 comments, with an average of 1.00 upvote
Try checking if you have root, e.g. with this app. If you don't have it, there might be something else on your phone triggering SafetyNet, which obviously requires some researching. In this case I don't suggest trying these any of these methods as they most probably won't help you.
I can try to assist if you tell me your phone model and the ROM you are currently running.
Could you install a root checker app just to make sure if the device is rooted or not?
If it's really not rooted, you'll have to root it in order to delete the .xml file. Just do the "I have systemless SuperSU" method. After doing the first step (full unroot), check again what Root Verifier and SafetyNet Helper say. If Root Verifier says you're not rooted and Helper says you pass, just continue with the steps. You'll end up with root access & Magisk, and then you can try browsing to the root directory again to remove the file. Then try the game again.