cnMatrix Release 2.1.1 is available on Cambium Support site. Attached is the Release Note.
Please use TFTP/SFTP to upgrade the software on cnMatrix switches. Software upgrade from the cloud will be available later this week with the rollout of server build 2.2.1-r24.
We have found a software defect that renders the switch to stop forwarding traffic when a SFP Copper transceiver is present. For this reason Release 2.1.1 is no longer available on Cambium Support site. We are working on the resolution and will provide a new release.