Brett,
I have just installed Marked 2 and am trying to use it in conjunction with BBEdit.
I'm using GitHub Markdown and cannot get inline images to display (see the attached screen shots).
I've looked at the "similar questions" and have the same problem. The suggested fix does not resolve the problem.
Any further suggestions please.
Regards,
Peter
macOS: Tahoe Version 26.4.1
Marked 2: Version 2.6.46 (1071)
Finder with all files in the same folder:

Output from Marked 2:
