I'm having an issue with the common event not running properly in battle, Is it not compatible to be used in battle? It gets to this point in the picture and responds to the ok being pressed by showing the ok button moving but the bar doesn't react at all and it stays stuck here.

As far as I know, it takes a bit more work to get it functional in battles but it can definitely work. Try making sure that any common events set to  parallel process  are changed to autorun instead, since I think there are issues with parallel processes in the battle scene.