if you care about right to repair and the ability of regular people to make a living and choose their own destiny(i.e. live independently of a mega-corp), this type of error message should bother you. HTML is a mature tech. There is no reason for this type of error
Either the browser has Javascript disabled (Tor), or its Javascript engine is very outdated/broken (a couple of old Firefox forks) or doesn't support Javascript at all.
It doesn't necessarily mean the browser is vulnerable to anything, just that it's not a browser normal websites would expect to encounter so the bot check fails.