With Brexit that has UK closed his trusted list. As a result, updating trusted lists may fail.

• To update the trusted lists in Sign Live! CC version 7.1.6 is additional "Sign Live CC 7.1.6 - Hotfix Trusted List Update " are required for operation.
• From Sign Live! CC Version 7.1.7 can be updated without any problems.

For Sign Live! CC Versions older than version 7.1 6 do not have a hotfix. In this case, you have to migrate to the current version.