No Deletable Fonts Found. To Add Your Custom Fonts Place Them In One Of The Following Directories -

C:\Windows\Fonts

~/.local/share/fonts /usr/share/fonts (system-wide) C:\Windows\Fonts ~/

C:\Users\<YourUsername>\AppData\Local\Microsoft\Windows\Fonts or C:\Windows\Fonts ~/

%LOCALAPPDATA%\Microsoft\Windows\Fonts

This message means in the standard locations. C:\Windows\Fonts ~/