The Nymi Band Application manages certificates to secure
communications between the Nymi Band and the BLE adapter. When this error appears,
Nymi Band Application cannot retrieve certificates. Reasons can
The Enrollment Terminal cannot communicate with the NES server.
The L2 certificate on the NES server has expired.
Review the knowledge base for information about troubleshooting connectivity
issues between the enrollment terminal and the NES
Replace the expired L2 certificates, the Nymi Connected Worker Platform—Administration Guide provides more information.
After you resolve the cause of the issue, log into the Nymi Band Application again. The
certificate retrieve occurs automatically.