If you see the error message “Content is blocked. Contact the site owner to fix the issue.” when using the Aircall CTI in Salesforce, it usually indicates a configuration issue within Salesforce security settings.

Symptom

When attempting to use Aircall CTI in Salesforce, users encounter the following message: "Content is blocked. Contact the site owner to fix the issue."

Cause

This issue occurs because a Trusted URL configuration is missing in Salesforce. Without this setting, Salesforce blocks content from Aircall domains as part of its security controls.

Solution

Follow these steps to resolve the issue:

Steps:

  1. Go to Salesforce > Setup console
  2. Search for Trusted URLs.
  3. Click New Trusted URL.
  4. In the API Name field, enter Aircall.

  5. In the URL field, enter:

    https://*.aircall.io
  6. Check all boxes in the CSP Directives section.
  7. Click Save.
  8. Reload the Salesforce page.
  9. Clear your browser cache and log back into Salesforce.
Setup console in Salesforce and where to find the API Fielf, URL, etc.

After completing these steps, the content-blocking issue should be resolved.

Important: If the issue persists, verify that your network and firewall settings allow connections to Aircall domains:
https://*.aircall.io

Additional information

For more details on setting up your Aircall CTI in Salesforce, see How to configure your Aircall CTI within Salesforce Lightning.
Also, ensure that the user email addresses match between Salesforce and Aircall to maintain proper integration.