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TroubleshootingDesign Library - Connection Error
Troubleshooting

Design Library - Connection Error

Fix connection errors in the Kadence Design Library when using WP Templater Block Templates and re-connect to the template cloud.

Symptoms

When opening the Kadence Design Library with WP Templater Block Templates enabled, you may see one of these messages:

  • No Connection data available
  • Error, Unable to access library database, please try re-syncing

These errors mean your site cannot reach the WP Templater template cloud, usually because of a server, security, or connection setting.

Why this happens

Kadence uses two main things to load WP Templater Block Templates into the Design Library:

  • The WordPress REST API to sync and download templates
  • Outbound HTTPS connections from your server to reach the WP Templater template cloud

If either of these is blocked, missing, or misconfigured, the design library cannot connect and shows a connection error.

Step-by-step fix

Check your connection data

Open the Kadence Design Library, then open the WP Templater connection panel (plus icon / connection settings) and confirm your Connection URL and Connection Key are correct and not empty.

Where to find your connection details:

  • Free Fallin templates: Check your original welcome email from WP Templater for your connection URL and key.

  • WP Templater Pro:

    • Get your Connection URL from the Block Templates docs.
    • Get your License Key from your WP Templater Account → My Account / Downloads.

After updating the URL or key, save the settings and re-open the Design Library to see if templates load without errors.

Re-sync the design library

Use the Sync with cloud or Refresh icon in the Kadence Design Library to force a new sync with the WP Templater cloud.

Wait for the sync to complete. If the connection is working, the error disappears and you see the WP Templater template categories and previews again.

Check if the REST API is blocked

Security tools can block the WordPress REST API, which Kadence uses to communicate with WP Templater.

  • Temporarily disable security plugins, firewalls, or ModSecurity rules in your hosting control panel.
  • With those disabled, re-open the Kadence Design Library and run the sync again.

If the error goes away, re-enable your security tools and configure them to allow WordPress REST API requests and Kadence/WP Templater requests, then test once more.

Confirm outbound HTTPS requests are allowed

Your server must be allowed to make outbound HTTPS requests and support cURL/SSL.

  • In WordPress, go to Tools → Site Health → Info → Server and confirm that cURL is enabled and there are no obvious SSL or connection issues reported.
  • Check your hosting panel or host documentation to see if outbound HTTP/HTTPS connections are restricted or filtered.
  • If you see SSL errors or blocked outbound requests, contact your host and ask them to allow connections from your site to the WP Templater cloud.

After your host confirms outbound HTTPS works correctly, open the Kadence Design Library again and re-sync.

Still not working?

If you still see:

  • No Connection data available, or
  • Error, Unable to access library database, please try re-syncing

after completing all steps:

  • Contact your web host first and share that your site must access an external HTTPS API (WP Templater template cloud) via the WordPress REST API and cURL.
  • Ask them to confirm that nothing on the server or firewall is blocking those requests.

If your host confirms everything is open and you still cannot connect, reach out to:

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