b5n.1password.eu is a subdomain of the 1Password domain, but it doesn't actually load a working website. Instead, visitors see a 'Bad Request' error, and there's no content, contact information, or legal pages anywhere. That's a red flag for any site, especially one that might be mistaken for an official 1Password service.
A legitimate business or service would have an about page, privacy policy, and some way to reach them. This subdomain has none of that. The lack of a Wayback Machine history also means it's either brand new or was never meant to be publicly accessible.
If you're wondering 'is b5n.1password.eu a scam', the evidence doesn't support a scam label because there's nothing to scam you with — it's just a broken page. But the absence of transparency and functionality means you shouldn't treat it as a safe or trustworthy site. Avoid entering any personal data or clicking links on this page. If you were expecting to find a 1Password-related service here, reach out to 1Password support directly through their official channels instead.