Hi! Looking into this, its as you say being a fault of one of the dependencies. As is, there isn't much I can currently to to fix this with your mod setup, until I implement Dys Chem World more directly into The Nauvitian, as with purely my mod and pack alone I cant recreate or trace this issue.
However, further in the future as I work through my roadmap of improvements, I will be able to dissect the chem world mod and repurpose/bugfix that specifically.
Unfortunately at this time, all I can suggest is starting with no mods installed, then adding The Nauvitian, then adding the rest of your mods piece by piece until the mod that adds "unknown fluid" appears.
Elsewise I will make a ticket to sort this error when i can get to it in the next few version updates, please look forward to it!
Thanks for the report, and sorry I cant be of more help currently orz.