I am stuck with this issue. When i run the apk from bin then works properly. But when i create signed apk using keystore then a toast of "An internal error occurred" . Please help me out. Suggestion appreciated.
Thanks Kind regards.
I am stuck with this issue. When i run the apk from bin then works properly. But when i create signed apk using keystore then a toast of "An internal error occurred" . Please help me out. Suggestion appreciated.
Thanks Kind regards.
In my case, I followed correctly all steps defined here at https://developers.google.com/+/quickstart/android
And still there error occured for me, the solution was to actually set an email address in the Consent Screen in the Developer Console. As soon as I set my email address in that form, it started working.
You can find the Consent Screen under API and auths. Just fill required fields and submit.

I hope this helps you.