Somewhat overlooked in recent FlexMaster 9.13.0 and 9.13.1 release notes, Caveats, Limitations and Known Issues describes the effect of original Ruckus FlexMaster certificate expiration coming on March 26, 2017. This will impact ZD and Solo APs communication, preventing FM from being able to fetch information.
A detailed FlexMaster Certificate Renewal Guide has been posted to Support and scripts to update FM, ZD, Solo APs that may need it. Please read this guide if you or your customers employ the FlexMaster NMS.
Post any questions under the FlexMaster forums group. Thanks and best regards.