License — Upk Not Found

: Sometimes the communication between the software and the hardware key (if using a dongle) is broken. Reinstalling the ZKTeco drivers can re-establish this link. Other Common "UPK" Contexts If you are not using ZKTeco software, "UPK" might refer to:

lmstat -a -c [email protected]

To fix the issue, you must identify the root cause. Below are the most common triggers: license upk not found