An instance of Fanalab is already running
I have been dealing with getting a pop-up/error when playing iRacing saying:
"An instance of Fanalab is already running"
I can't find any solutions anywhere. What I can say is that although not very frequently, I've been getting this for the past year and it think it's important to note that I recently had to completely wipe my machine for something unrelated and it continued to happen on this fresh system with pretty much nothing else on it except Fanalab, iRacing, ACC, crew chief and Simhub.
That means you already have an open instance of FanaLab running in the background. Maybe in the Tray?