"An internal error occurred" with integration of Google Plus Login

I have this problem and even after creating 10 different client IDs with different SHA and package name, it doesn't work... until I found out that you have to fill the Consent screen.

According to GoogleDevelopers Console -

The consent screen will be shown to users whenever you request access to their private data using your client ID.

This can happen when you haven't set the signature for the client ID in your API console project, or if you copied the wrong key value from keytool. Doing so is documented in the steps of the quick start guide on steps 7, 8, 9, and 10.

I've solved problem by removing .setScopes("PLUS_LOGIN") in the PlusClient.Builder.

I got this toast message error in my android application:

An internal error occurred

Summary:

Assuming you made a mistake configuring the negotiation between your android app and the Android API server granting you access. Most likely caused by you not adding the correct package name or correct SHA1 fingerprint. I followed these steps to blow out the wrong configuration and do it right.

Steps to fix:

1. Go to your google api console and login: https://code.google.com/apis/console

2. Click "API Access" tab.

3. Click the button: "Create another client ID".

4. Choose: "Installed Application" radio button.

5. Choose: "Android" radio button.

6. Enter the package name of the android app that is displaying the above error. You can find it defined at the top of the PlusSampleActivity.java code file. For me it is com.google.android.gms.samples.plus

7. Acquire your SHA1 fingerprint value:

   a. Use the command keytool -list -v -keystore /home/el/.android/debug.keystore. Enter password, If you never set it, the default password is 'android'.

   b. The SHA1 fingerprint is shown on screen, copy that.

8. Paste the above value into the "Signing certificate fingerprint (SHA1):" box.

9. Click the button: "Create client ID".

10. Run your android application again, click "Sign in".

Now you are presented with an Activity to "Sign in to Google+ SDK with Google".

In my case, the solution was to actually set an email address in the Consent Screen. First, I was a bit reluctant to select my personal address and for an strange reason you can save the form without this piece of data with no error. After checking what others have suggested, as soon as I set my email address in that form, it started working.