Why can't I connect to the registration server on my site?

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Topic summary

A user encountered an error message stating “Could not connect to the registration server” when attempting to use a subscription/newsletter form popup on their e-commerce site. The error was confirmed by support staff who tested the form at the bottom of the store.

Resolution Found:

  • The issue was traced to an incorrect “MailChimp form action URL” in the Avone v2.5 theme
  • Someone had changed the URL address, and reverting to the correct one resolved the problem

Ongoing Issues:

  • At least two other users report experiencing the same registration server error
  • One is using the Avone theme and seeking guidance on obtaining the updated MailChimp URL
  • Another is using Dawn/freestorebuild premium theme and encountered the error during testing their newsletter signup form

The discussion remains open as additional users seek solutions for their similar connection errors.

Summarized with AI on November 2. AI used: claude-sonnet-4-5-20250929.
2

Hey @alishahzad .

Thanks for reaching out.

I appreciate that you have shared your online store URL for us to take a closer look. When I navigated to your online store and tested the Subscription/Newsletter from the bottom of the online store - I received the same error message.

Just to gather some additional context, did you make any custom coding changes to your online store? Could you also let us know which theme is live on your online store?

If you are unsure about which theme is live on your online store, you can navigate to the Theme Editor and select the three dots appearing towards the top left of the page. I took a screenshot from my test store of the section I am referring to:

11-43-89165-83455
11-43-89165-834551141×663 123 KB

Looking forward to your response.