ISSUE
After upgrading an old version of the DualShield server to a newer version, trying to access the admin console or self-service console fails with the error "Unknown algorithm name: [PROX/TOTP]"
CAUSE
There was a module called "dual-proxcard-1.0.jar" in the old versions. This module is obsoleted in the new versions and therefore removed in the upgrading process. However, its reference is not completely removed from the new versions, which means that the module is still required to be present in the new versions.
RESOLUTION
To fix this error, you can simply copy the module from the backup folder
