The game grants a free simple glyph (at L20?). You can tell it apart from a real working glyph by linking it to chat and inspecting the text. It will be “bind on pickup”.
Bug: the bind-on-pickup free glyph can’t be used to empower other glyphs. Also, without linking it to chat, it’s indistinguishable from normal glyphs, making newbees wonder “what am I doing wrong?” This issue crops up regularly in #Sanctuary chat, though not frequently enough to elicit a quick and ready how-to-fix reply.
Work-around: since it’s a simple glyph, there are really only two choices for using it as a player: you can sell it to a vendor or you can empower it to L20 and then use it in fusion to empower a 3-dot rune (just tested fusion on an alt and it works).