November 2017
Wanted to update my situation;
I still get a LE from making serums [and an error when i use mccc], but I am able to level vet skill on the table by doing "lab work". Also, even though the serums look empty and incomplete, I am able to put them in the sims inventory AND use them after the t-pose/error/LE. It's still annoying though.
November 2017
We had had terrible wind storms where I live that kept knocking out our power. It actually flickered on and off while my game was saving and somehow corrupted the file. I created a new vanilla save to see if it keeps happening, I will let you know.
November 2017
What I found out is that my Sim, when playing a vet and use the medicine craft å matic is that it works fine untill he or she gets in a relationship. Strange.
November 2017
I was having this problem, and I've started a few fresh games, and noticed that it seemed to start when I'd bought traits with reward points. So, fresh file and queued up a bunch of medicine, then as each one completed safely, I'd add a -new- trait. Got to Marketable and it broke again. Went back to fresh save, took marketable again, same thing.
So, if you are having this issue, see if you have the marketable trait? That could be the culprit - if not, then I'll do some more testing with a fresh game.
November 2017
I uninstalled and removed all the files of The Sims 4 today. And installed all over. Still have the same problem im afraid. Ty for trying to help
November 2017
I also created another vanilla save and everything worked fine until I purchased the marketable reward. I definitely think that is what is breaking the interaction with the craft table
December 2017
This does seem to be tied to the Marketable trait. Once I removed that trait my sim is able to make the treats/serums without the glitch when they finish.