Hello, I had the same problem today, do not modify anything in my project, just add some comments between lines, after exporting my apk debug it did not work on my android device, however after disabling google play protect, even so it did not work correctly, but running my application in the browser I decided to open the google chrome console, I discovered that an error related to Ads pluging appeared, I decided to delete all the instances of that plugin to try again and after exporting an apk again debug, it worked correctly on my device.
I find it a bit strange since yesterday I did not have that problem with pluging, but today after the update I failed my app without adding any extra code, just a few comments.