Importing error message

[AnnT]

I keep getting an error message that says "not all designs are mapped to a key". I can't figure out what I am doing incorrectly. I opened the font folder, selected all, adjusted alignment, and then saved font. That is when I get the message. Some letters are shown as Unknown across the top of the letters. I am trying to add Lobster 2 upper and lower case from PES format.