1. Quit Chrome completely

2. Delete the local state file.

For Mac

In a terminal window, enter the following:

admin@admins-Mac-mini ~ % cd Library/Application\ Support/Google/Chrome

admin@admins-Mac-mini Chrome % rm Local\ State 

For Windows

Go into Windows Explorer and make sure you can view hidden items.

Navigate to C:\users\(username)\AppData\Local\Google\Chrome\User Data

Delete the Local State file.