Article - CS369876
"ERR_CERTIFICATE_TRANSPARENCY_REQUIRED" is seen after enabling SSL/TLS on Apache Tomcat for ThingWorx Platform
Modified: 22-Sep-2025
Applies To
- ThingWorx Platform 8.5 to 9.7
Description
- Enabled HTTPS via the steps in CS231610 and now getting ERR_CERTIFICATE_TRANSPARENCY_REQUIRED in Chromium based browsers (e.g. Google Chrome)
- Cannot reach ThingWorx without adding security exception
- Seeing Certificate Transparency error in browser
- Browser notes a Certificate Transparency issue when attempting to reach ThingWorx Platform after enabling HTTPS
- Renewed SSL certificate for ThingWorx and now unable to reach Composer
- ThingWorx Platform certificate issued by a publicly trusted Root Certificate Authority (CA) shows Certificate Transparency error when validating it
- New certificate for ThingWorx is missing Certificate Transparency Log information
- Newly issued ThingWorx Platform certificate does not contain the Signed Certificate Timestamp List (SCT) field
- Seeing the following error message after enabling SSL/TLS on Apache Tomcat for ThingWorx Platform:
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