Finally fixed, fully thanks to Y.Y.Weiss for taking the time to put in said fix and sending it to me.
This is a case of great idea, hectic day, not so great execution. But you may still enjoy it.
Numbers in Red and Blue indicate the number of common shaded cells in that row/column between the Nurikabe and the Tapa. The Red ones mean that there has to be at least one shaded cell in the Tapa that wasn’t in the Nurikabe, and the Blue ones mean that there cannot be any extra shaded cell in the Tapa, the shaded cells must be a subset of the ones in the Nurikabe.
Numbers in Green indicate the number of cells in that row/column that were NOT part of the Tapa wall but ARE visible in the Corral loop. Numbers in Purple indicate the number of cells in that row/column that are part of the Tapa wall and are visible in the Corral loop as well.