How do you fix login error there is an error logging you into this application?
To fix this issue, Make sure you already uploaded your app to the play store and enabled “app signing by Google Play”.
- Login into your Play Console account.
- Click on the app with which you are facing an issue.
- Now from the left sidebar go to Setup => App Signing, where you will see something like this.
Why can't I log into Facebook on the app?
If you're having trouble logging into your Facebook account from your Facebook app: Make sure that you have the latest version of the Facebook app, or delete the app and then reinstall it. Try logging in from a mobile browser (example: Safari, Chrome).
How do I fix unexpected error on Facebook app?
The solution is to uninstall your Facebook app, then install it again. Marketplace errors in Android can be fixed through the App Store, or Play Store. After the app has been reinstalled successfully, you can access Marketplace and verify that the error is gone.