Chrome depreciated one of the features that allowed these popups to work, here is a temporary workaround to get it working.

Download the Chrome Policy Plugin here

1. Open the zip file you just downloaded and locate the .ADM file that best matches your system:
2. Extract the .ADM file to any folder on your hard drive
3. Go to Start > Run, and run gpedit.msc
4. Right-click Local Computer Policy > Computer Configuration > Administrative Templates, and select Add/Remove Templates:
5. Add the adm template that you saved to disk earlier:

• You should now see the template underneath a Google > Google …