My system is a current ArchLinux install with Ghostscript 10.04.0-1 and libpaper 2.2.5-1. Attempting to print from Okular to Boomaga resulted in the following error:
I can't start gs converter: "GPL Ghostscript 10.04.0: Unrecoverable error, exit code 1"
The Boomaga GUI did not appear. Asking Perplexity.ai about how to fix this resulted in six suggestions, including reverting Ghostscript to v9.53.3. After reverting Ghostscript, the print ended with an error message indicating that Ghostscript was unable to load libpaper.so.1. Reverting libpaper to 1.1.28-2 resolved that problem and Boomaga was able to receive the file from Okular and successfully print it.
It appears that Boomaga is compatible with Ghostscript 9.53.3/libpaper.1.1.28, but not with Ghostscript 10.04.0/libpaper 2.2.5.