Unable to sign in to ArcGIS Online from ArcMap using Google credentials

Description

When signing in to ArcGIS Online from ArcMap using Google credentials, the following errors are encountered:

“An error has occurred in the script on this page"

"Google couldn't sign you in”.

This is logged as BUG-000127774.

Note:
This issue also affects ArcGIS Pro, and a workaround for that product is found in the article "Bug: Unable to sign in to ArcGIS Online from ArcGIS Pro using Google credentials"

Cause

The issue occurs because a script on the Google sign-in web page is incompatible with the Internet Explorer version used for the embedded browser dialog in ArcMap.

Workaround

Adjust the Internet Explorer version of the web browser using a registry key.

Warning:   
The instructions below include making changes to essential parts of your operating system. It is recommended that you backup your operating system and files, including the registry, before proceeding. Consult a qualified computer systems professional, if necessary.

Esri cannot guarantee results from incorrect modifications while following these instructions. Therefore, use caution and proceed at your own risk.

1. Click Start > Run.
2. Type regedit in the Open box and click OK.
3. Browse to the following registry key:

HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION

4. Add a new DWORD (32-bit) Value for each of the following executable files:
   • ArcMap.exe
   • ArcCatalog.exe
   • ArcGlobe.exe
   • ArcScene.exe
5. Right-click FEATURE_BROWSER_EMULATION, and click New > DWORD (32-bit) Value.
6. Name the key as indicated in step 4, for example ArcMap.exe.
7. Right-click the key, and click Modify.
8. Modify the key Value data to 2af9, and click OK.
9. Repeat steps 4 through 8 for each of the remaining three executables.

Note:
Delete your browsing history in Internet Options to clear Google credentials used with ArcMap.