"NO REBIS AVAILABLE TO USE" even with Rebis in inventory

To summarize the comments, you don't actually have rebis, nor even the requirements to craft it. You have the recipe it seems, but not all the sources needed to get any, and all that's highlighted in the third screenshot is just a source, not the rebis itself:

Assuming you have the recipe, rebis can be crafted from white gull, verbena, ergot seeds, allspice, and mistletoe. In your second screenshot you can see that you're missing ingredients to craft it. – Roddy of the Frozen Peas Aug 27 '20 at 11:35

It's kind of like how you say that milk is a good source of calcium. – Roddy of the Frozen Peas Aug 28 '20 at 0:20