Couple of decades into a game of New Civilisations, I get a popup saying I have a critical resource shortage of Exotic Gases and hits me with a 25% output penalty for all pops.

1. In this mod, exotic gases is supposed to be deuterium I think, but I have 9,000 units of deuterium

2. In fact, most of my resources are stockpiled in the thousands and none are in deficit, screenshot below. The only resource intensive thing I was doing at the time was upgrading a 90 ship fleet. I cancelled the upgrade and let it run for a few months, but the shortage of "Exotic Gases" persists. I see you can unlock "Exotic Gas Refinery" with mining specialization but all it does is just produce more deuterium of which I already have giant stockpiles of.

Is this a bug or am I missing something?

Screenshot: https://imgur.com/40sAzCi