I cannot import my bitmap fonts that I’ve created in PS. I have each letter on it’s own layer and all my letters are in line but when try to import all 26 lower case letters or try to batch them. I just get an empty glyph and a warning symbol.
Based on your one screenshot, it’s hard to tell or see why the glyphs were not created in Fontself. I just tried it myself for three letters, with each letter on its own layer (no subsets!). The rasterised layer can be a normal layer or a smart object.