Ok so the image won't load for some reason but any time I try to join the server I get " Failed to syncronize registery data from the server " I have no idea what this means and no matter how many times I close & relaunch minecraft I continue to get the error prompt

Are you on the latest version? Have you downloaded the new update?

As above, make sure you are on the latest update
https://www.curseforge.com/minecraft/mc-mods/the-dalek-mod/files/4258146