A fairly easy one, your logo svg is invalid. You likely have the original svg, I recovered it from the .fzz file using the instructions here:
That said, the svg has multiple paths in it. A logo svg can only have a single path (created by combining paths in Inkscape.) I have never actually been able to get this to work I don’t know enough about paths, @opera_night is the expert here. He has several how tos on this subject in the tutorials section. There are also a number of bugs in the gerber generation code Kjell fixed at least 5 of them in the 0.9.5 dev version a couple of months ago (but it isn’t released yet.) A search in the forum search bar for pcb logo will turn up a bunch of posts too.
Peter