Sometimes your browser can end up with a broken state that makes it impossible to use Vaam. This can manifest as pages not loading, not being able to login, or other issues. First, you should try this list of actions to resolve the problem:
Log out and log in to Vaam again
Restart your browser
Restart your computer
If you've completed these steps and still have the issue, another thing to test is to reset cache and cookies for vaam.io. Read on to learn more.
Reset cache and cookies
Open your browser
Browse to chrome://settings/content/all?searchSubpage=vaam.io (you need to copy and paste the link)
Make sure it says "vaam" in the search box (1 in the image below).
Click "Remove all shown" (2 in the image below)
Click "Clear all" in the popup dialog
Restart your browser
Login to Vaam