Heyyo - I haven't been able to track the source of this issue. It seems the Flare Stack (Angel's Petrochemical Processing) and the Burner (Pyanodon's Industry) have no valid recipes. I can't insert anything in to them. I have everything installed, along with all optionals that still exist. Some optionals seem to be missing from the mod portal, but that's not really a pressing concern for me compared to the flare stack/burner issue.

@djfariel
These items does not have a "recipe", you can simply connect them with items (loader/pipes/inserters) and they will destroy the items automatically without choosing any recipe.
Remark: Each type of "destroyer" can only destroy special things, e.g. a "burner" can only destroy materials without energy, or a "flare stack" can only destroy gases.
You can also have a look to the "pyanodon" destroyers, they are also very powerful. There is a sink hole where you can throw fluids into a big hole :D

Does that solve your question or does the error occurs anyway?