If Icons8 Windows app is launched by a local user while another program (ex. Photoshop, Lunacy, Visual Studio, etc.) is launched with elevated privileges (usually Admin privileges), most likely the icons transfer will not be successful. This issue is concerned with Windows security system.
Solution #1 (for constant use):
A user needs to launch Icons8 Windows app with elevated privileges. To do that, follow these steps:
Go to C:\Program Files (x86)\Icons8
directory
Screenshot
Right-click on Icons8.exe file and choose “Properties”
Choose “Compatibility” tab
Select a checkbox “Run this program as administrator”
Screenshot
Click “Ok” in “Properties” window
Solution #2 (quick solution but required for every launch):
Right-click on Icons8 Windows app in a Taskbar or a Start Panel and choose “Run As Administrator”