I can launch dragon center, but it shows no options at all. I can't set a single thing. It doesn't crash, just doesn't allow me to do anything like it's not able to aggregate/poll for hardware. Tried running as admin, no difference. Submitted a ticket to MSI over a month ago with no response, so don't expect much from support if you buy one (maybe if it was a hardware issue I would have gotten a response, but no clue). Chalk me up to not very impressed with their software or customer service, but the board itself is stable and works great.
I had my issues using Dragon Center on a b450 Tomahawk that had a Zen2 bios on it.
Basically bios is cut down to the pt you are have to use DC for granular control over fans.
You just highlighted why A520 may be a good buy for a basic Zen2 build vs buying older chipsets running a cut down bios with serious support gaps.