I had that problem about 3 weeks ago. I reached out to them and the response was, "so your chart doesn't load up for a couple minutes..." as if I was an anal retentive asshole. I has to explain that 2 minutes when you're day trading/scalping is a BFD! Anyway, he said he updated a parameter on his system, but to call their true tech support if that didn't do the job. It did.Oops. One year and one day ago.
%%Interesting how I started a similar thread exactly one year ago. Futures charts are loading no problem. Stock data is showing on top of each window, but no charts.
Rebooted, opened TOS both normally and as admin and still nothing.