I am unable to add the combs to the input portion of the centrifuge. Also taking a look at JEI the centrifuge recipes are nowhere to be seen. Just earlier in the day (as of making this post) I was playing the game with no problem, so I'm not sure what may have caused this. I have already tried reinstalling the mod (as well as all of the other mods in this modpack).

what happened between earlier and now? did you update or add any mods? are you playing on a server and if so, does it work in single player?

This is all purely single player. I had very briefly added then removed two mods (Embeddium/Rubidium Extras and TexTrue's Embeddium Options) to show someone else a conflict between just those two, but I wasn't even able to fully open the modpack because of the conflict screen. I had been playing the modpack just fine with those two mods disabled beforehand.

UPDATE: I checked for updates again on ATLauncher and PotionBlender needed an update. This seemed to have fixed the issue. I apologize for any inconveniences.