MC 1.19.2
QSL 4.0.0 beta 9, provides Fabric API 0.60.0
Note, Quilt loader can also use regular Fabric API, which lets the mod work, however, QSL is needed for Quilt exclusive mods, so I have to use it.

Quilt is a modloader that natively supports all Fabric mods with rare exceptions, and currently Decorative Blocks causes a crash on startup. Could you please look into it? Usually, adding support for Quilt doesn't even require maintaining a separate version, Fabric one should work on both. However, I'll understand if you decide not to do it.

It might also be a problem on Quilt's side, so let me know if it's not something you can fix.

Logs: https://gist.github.com/SplendidAlakey/7541144c23df3740dcb01bbbc1a0d5ef

I just looked into this issue and it is caused by not using the Fabric API to register the fuel times for your item/tags. This can probably be easily fixed by creating your blocks and items within the static class initialization instead of through an init method, which isn't needed.

I'm having this problem, too. The crash on startup.

Also chiming in that this is happening for me. Here's a log with just the barest configuration loaded:
-Decorative Blocks 3.0.0 (1.19.2)
-Quilted Fabric API (qfapi-4.0.0-beta.20_qsl-3.0.0-beta.21_fapi-0.66.0_mc-1.19.2)
Log: https://mclo.gs/JDZqCXK

@lilypuree are you able to look into this? It seems the issue is just the way fuels are registered, according to OroArmor.