Starting from release 1.66, all agent versions older than and including 0.55.3 will be deprecated and will no longer work. Make sure to update your agents.
Nobl9 agent (0.66.0-beta04)
Here's what changed in the Nobl9 agent 0.66.0-beta04:
High-level vulnerability: CVE-2023-2650
Replay instability issues affecting New Relic replays.