Ok so the script is running but it is either not detecting the fonts ob your system or something else is going on. There is an explanation about how to see which fonts jitai detects in the jitai thread:
Could you give this a try? That’s at least what I would do next if I had this issue.
And I guess you also did try things like restarting chrome and (while we’re at it ) your PC once just to rule that out as a cause?