Continuing the discussion from Papyrus Font SVG issue details - nailed it:
For what it’s worth (and I feel pretty worthless at the moment), I went through the unusable SVG path command-by-command to find the culprit. Here it may be:
Removing that allegedly allows the file to upload successfully. But why?
a” is for arc, with parameters “
rx ry x-axis-rotation large-arc-flag sweep-flag x y”. Specifically (but not too factually), it’s those last two 0s, for
y, that could be causing the crash (for example, changing it to
a.08.08,0,0,0,0-.07 also supposedly allows the file to upload successfully). An arc with a length of 0 is, at best, meaningless. At worst, it leads to dividing by zero somewhere and the universe collapses into a black hole.
I am, theoretically, unable to generate such a “bad” file with the version of Illustrator CC 22.0.0 on my computer. In fact, just opening the SVG provided by @henryhbk at he beginning of the topic and re-exporting it, regardless of the options I select, appears to generate a different path that might not have any dodgy arcs, and potentially loads successfully. So my guess is that there may have been a change to Illustrator at some point that fixed this seeming behavior.
I’m providing these opinions here in case Glowforge wishes to update their own software to be more tolerant of this hypothetical edge case, and this post should not be interpreted as a recommendation to perform any actions not officially endorsed by Glowforge or the forum elites.