Grey screen when opening

I'm trying to access app inventor, but when I hit I just see a grey screen and can't do anything. I've tried on Chrome, Edge and Firefox. I live in Spain. How can I solve it?
Here's a screenshhot


Does this work ?

No, and I've tried on the three apps. Thanks anyway

The servers are there and working....

  1. Restart Browser
  2. Restart Computer

Check for any changes to Firewall/DNS/Internet Connection

Try a different computer

So, I've been looking on the console, and it says that the three browsers are not compatible

Which security/firewall software do you have installed?