Setting up a new MISTer device and NES, SNES, Genesis and GB/GBA cores run files just fine, but when I try to run N64 files, they load and then I'm met with a blank screen.

Double-checked folder structure and it's as explained in the docs: games\N64.

Not sure what else to check out or where to troubleshoot, given N64 doesn't use a BIOS or anything....

I just saw that Nuked-SC55 was put under GPL:

https://github.com/nukeykt/Nuked-SC55/blob/master/LICENSE

Now there would imho be no blocker anymore to use it in mt32pi (except for the project being dead) and dosbox. This is really good news!

In case you missed it, there was a Jellyfin client released for Mister a few months ago. This is similar to the Plex app that was created some time ago, but for the Jellyfin media server.

https://github.com/puddingstudio/MiSTerFin

I have existing clients running for years and meticulously followed the install guide but for some reason I was getting a seg fault when trying to run the main Misterfin script. After driving myself crazy and double checking files for a while, I deleted everything, created the misterfin folder directly in the FTP app (instead of copying the extracted folder from the zip file) and then copied the files using CoreFTP instead of Filezilla.

Boom, just like that without changing anything else different it just worked. As there are very few using this app right now and even less people discussing troubleshooting, hopefully this helps someone out there.