Offline updates built with TCB 3.11 fail

Additional info:
I am running updates one the Tezi 6.6.0 custom image (TorizonCore 6.6.0-devel-20241118120946+build.0) based on 6.6.0 with Aktualizr package being reverted to the version where offline updates are working with once command (as discussed here Yocto build TorizonOS doesn't recognize lockbox).
Any TCB version between 3.9 and 3.12 (also tried early-access) build Lockboxes are correctly recognized as valid updates, but all of them fail update process with this error.
The lockbox build process didn’t change.