I launched NT8 to add the DAX contract to my watch list, but saw that all my charts were screwed up upon launching it.
So I tried to load a chart template, and got an error message that said: Unable to load chart template...
So I tried to load my indicators to see what that looked like and got an error message that said: Unable to create instance of NinjaScript...
So I shut down NT8 and tried to proceed to run System Mechanic, to see if there were registry errors, Windows junk files, etc.
But System Mechanic popped up a message that said that it could not run anything, because a Windows Update was being installed.
So I restarted my computer and then when I launched NT8, my charts were back to normal.
So sometimes when you get a NT8 error message, the culprit might be a Windows Update that is being installed.
Screenshots attached.