I investigated this problem by eliminating mods and restarting a gameplay up to the druid grove where I should be able to get some IP. And though this method can never be 100% certain, I'm quite convinced that it is the "Improved UI" mod that made the IP disappear. It's no longer maintained and obsolete, but was just still hanging there in my modlist, unseen and unknown for I don"t remember how long, until it suddenyl triggered this problem.
Now I removed it and got some IP again. So, players, check your mods to see if you still have this hanging around inthere and remove it.
