I wonder if anyone can help?

When I try to insert a font awesome symbol I receive a pop up box with the error "Internal Program Error 721.w.f.o.se" as per the attached screenshot.

I am trying to insert a font awesome symbol by first clicking on the font awesome font, then insert>font awesome symbol and then clicking on the symbol shown on the list. After that the error message appears.

Anyone have any idea what is wrong...or what I might be doing wrong?

Thanks

Christian