Blocked and Allowed Apps Not Working

Hi Abe,

We're glad to look into this & help you.
Since, repairing the program didn't help, we may need to try reinstalling.
Before proceeding to reinstall, please clarify whether the screen goes blank & disappears, upon clicking Add app.
Also, let us know if the specific app is already listed in blocked list.

I have been unable to add Apps to Allowed Apps. Every time I press the button the system goes thinks then the window disappears. Tried repairing the App without success. Any thoughts on how to fix this would be much appreaciated.

Could you share us the screenshot of the loading message? 
Refer this article for the steps to capture the screenshot : https://bit.ly/2Y6RCDP
You can post the screenshot here in your topic. Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions.