Comment 1 for bug 1859942

Whatsapp is doing user-agent detection, and blocking a valid browser for no good reason. This is not a chromium bug. I suggest reporting this issue to the whatsapp web team, and as a workaround you can use an extension that impersonates a different browser, like this one: https://chrome.google.com/webstore/detail/user-agent-switcher-for-c/djflhoibgkdhkhhcedjiklpkjnoahfmg.