Cookiebot JS Banner Blocking SSL Handshake on avangartclinic com

Avangartclinic

September 28, 2026 10:21

Hello Cookiebot Community,

We are deploying the Cookiebot GDPR consent banner script across our online booking platform to manage cookie consent categories, but we are running into a script blocking issue.

Technical Issue: When the uc.js Cookiebot script initializes on our primary web application domain (avangartclinic.com), the browser console blocks the auto-consent callback with a CORS Origin Header Missing and SSL socket handshake timeout error.

Environment Details:

• Portal Domain: avangartclinic.com
• Integration: Cookiebot Consent Manager / Custom JavaScript Web App
• Protocol: HTTPS / TLS 1.3 Encryption
• Browsers Tested: Google Chrome, Safari iOS, Microsoft Edge

Steps Taken:

1. Verified that the primary SSL certificate on avangartclinic.com is fully valid and cross-chain verified via SSL Labs.
2. Added Access-Control-Allow-Origin headers to our Nginx edge proxy server.
3. Verified that disabling automatic script blocking resolves the initial page loading delay.

Are there specific cross-origin domain whitelisting parameters or data-cbid attribute settings required in Cookiebot configuration for custom HTTPS web portals?

Any developer guidance or support insights would be greatly appreciated.

Thanks!

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  Stephaniej

  October 03, 2026 16:50

  Check the Cookiebot domain and data-cbid configuration first, since the SSL and Nginx settings have already been verified.

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