Could not load emulator database

Hi, I’ve installed Unity 2020.1.6f1 + Vuforia 9.4.6.
I create a new project, a simply scene with an ARCamera, but when I play it, the same error message is always returned: “Could not load emulator database”, and I can’t go on.
I had uninstalled and reinstalled so many times (Unity all versions), cleaned registry, and try a lot of purposed solutions, but I can’t fix it.
On another PC I installed it and it works fine, but it doesn’t work on my PC.
Any suggestion?

I’m having a same issue. I was working 2 months ago and it was fine but exact same problem right now. Did you find a solution? @ignacio_roldos