I have tried multiple times over the past few months to subscribe to the newsletter, link: https://account.community.amplitude-studios.com/account/newsletter
But every time i get the error "An error occurred, please try again later." In developer console in the console tab i see "Failed to load resource: the server responded with a status of 404 ()" and in network tab a "400 Bad Request" for the "optin-user" request.

I have tried multiple browsers and both normal and incognito mode with no luck.