This may not be an issue but I'm trying for few hours to get this to work. It's first time playing around draconic evolution so I may be doing it all wrong. This is my setup:

Tried with or without the capacitor.
Firstly I got the Wyvern Flux Capacitor and tried to RF upgrade it. After few attempts I wanted to try other recipes, see if I can get it work but it didn't.
Also the GUI of the crafting core looks a little weird I think.

I'm trying it on Skyfactory 3.

I finally got something crafted but I still can't figure why the Wyvern Capacitor Flux won't work to upgrade