What is odd is that once in a blue moon… maybe once a month, the right-click menu will work. I have no idea why.
vSphere is not free, but the hypervisor (ESXi) is. The menus also do not work in that web UI, either. You would need to deploy ESXi (it’s bare metal, so you’d have to install it on a PC or something), then make sure it’s connected to your same network with an IP address so you could reach it from a PC running Brave. I could definitely help you with that throughout the day via Google Meet or Teams.
Not sure what you mean by console error messages. I don’t experience a hard “error”. I either get the default browser context menu (on Brave) or the web app’s context menu (in Chrome). If there is something in the developer console I could look at or log, that would be awesome.