I have tried installing the above "TypeApp" in Garuda Linux OS KDE. Have been unable to do so using Snap. I am informed that snap could not be mounted.
Have tried the forms in Garuda and Snap without success.
I have previously used TypeApp in other OS's and would really like to be able to use it.

Hope that someone may be able to offer suggestions as I appear to have exhausted all my thoughts. Apologies if this is in the wrong place.

This has nothing to do with KDE/Plasma. Please ask your distribution.