~HostedEmail.Link~ tag linking to a blank page?

In the sent emails and test drafts, the ~HostedEmail.Link~ tag will change to Having trouble viewing this email? [Click here] and there would be a link.

But instead of the web preview of the eNewsletter, it redirects to a blank page with only “Oops! Sorry, something went wrong. Please try again later.”

Any fixes to this? Thanks!