The way I understand it, FX box is merely a host for add ons such as Real Paint FX. I bypassed the FX box host and loaded Real Paint FX as a Photoshop script in the latest version of PS. It seems to be working as it should now just running the script directly from photoshop.
After 2 days of failed attempted fixes I took a chance and dowloaded PS 2021. I initiated the jsx instalation file and it worked perfectly and already had all my FX Box plug ins populated in the panel. Now when I need it I open PS 2021 to work on my image. Not even close to ideal but for now its a workaround.