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 (0.65.0-beta07)
Here's what changed in the Nobl9 agent 0.65.0-beta07:
Fixed a problem with the Datadog plugin where a query returning multiple timeseries could affect other queries.