Hi there; first of all, I'm not sure if this is a "bug" in your mod.
I have Cerys and https://mods.factorio.com/mod/more-casting installed. I get this error:
Failed to load mods: Error while running setup for recipe prototype "casting-cerys-charging-rod" (recipe): Recipe is in 'crafting' category but has a non-item ingredient 'molten-iron' (fluid).
Now, that's basically not Cerys' problem - but it seems that More Casting does its thing in a pretty general way (https://github.com/LuziferSenpai/factorio-mods/blob/main/more-casting/data-final-fixes.lua - I have no idea what they are really doing there), and so I thought maybe your cerys-charging-rod needs an attribute or something such that it works with them?
I thought I'd try it here first, since More Casting hasn't been updated in a long time and it worked before - regrettably I don't know if this error is new due to an update of Cerys or the Factorio base game update to 2.0.49...
Any thoughts on that? If it all looks fine from your perspective, of course I'll file a bug at More Casting.
Thank you!
Edit: When I add cerys-charging-rod to their "ban list" in https://github.com/LuziferSenpai/factorio-mods/blob/64e6d25b35b974f63bd863a9bcce576c146c968a/more-casting/data-final-fixes.lua#L10, Factorio starts with no issues. Of course I can live with that - but just in case there's a sublte issue with your cerys-charging-rod and 2.0.49, you might want to look into that. :-)