Not much more to add... I was checking licenses to see if it would be permitted to create a compatibility mod/datapack for use in my modpack and came across a 404 error for Incendium. I'm assuming it's going to use the Stardust Labs License the other projects use, but wanted to be sure.
Edit: It seems all projects with the exception of Incendium Optional Resource Pack and Remove Terralith Intro Message are giving 404 errors for the license.