Hello to all.
Sooo, new problems, I guess. We have an app that, until now, worked perfectly on any device (except, maybe, really old smartphones). But suddenly, I think the last few weeks, it started to work well on some devices and not at all on others. We don't know exactly what is causing this.
Some data we have about this problem:
Xamarin forms App, but this is an issue with Android Devices.
The app requires a login which, sending the user and password thanks to an API, gives the user permission to enter the app and handle the data (not going to enter into details what this data is about). However, if the devices are equal or above Android 9 (I think that's API level 28), the login prompts an error as if the user and/or the password were incorrect. The funny thing is, if you try this on a device whose API level is bellow 28... it works!
Now, I hear you asking: "Maybe you should change the target Android version to 9 or above". And we did that! It is now at Android 10.0.99, or API level 30. And we had to update our SDK packages in order for the app to even compile (understandable). But nevertheless, the error persists.
And yes, the users' mobiles have connection (wifi, 4G, and whatnot), so is not their fault. We need a solution ASAP.
Many thanks to all of you and best regards.