Looks like Reliquary doesn't check that it's xpJuice fluid has been created before using it, thus resulting in it trying to create an invalid fluidstack. Looks like they changed how they registered it a fortnight ago, you're probably best reporting it to them here.
Make sense thank you for your help. I had some people from the enderio discord that couldn't identify it. I'm using the new enderio and my existing world is heavily weaved into IC2 and the last thing i wanted to do is disable IC2