When the font is enabled, Eagle keeps showing prompt message that asks for permission.

If you are enabling/disabling fonts, it keeps showing a prompt message "Do you allow this app to modify your device?", the possible reasons are:

1. Insufficient Windows user permissions 
2. User account control setting issue

How to fix?

1. Confirm current Windows account permissions or change your current account to "manager".
2. Close Windows "UAC notification", as following steps.
3. Click on the Win button in the lower-left corner and search for "UAC".
   
4. Click on the search result "Change User Account Settings".
5. Change the "Always Notify" to the "Never Notify".
6. Enable font again to see if the problem has been solved.