You also can check Bridge group name of Primary AP - it should be "default".Initialy when mesh extender is connecting to AP it search for bridge group name "default" which is fabric for CBW mesh extenders.

Hi, It seems that issue is one of mentioned in release notes of latest firmware release.I recommend you to open a support case in Cisco Small Business TAC.They should have a solution. Contacts you can find in link below:https://www.cisco.com/c/en/us/...

Hi, Yes the only way to upgrade mesh extender when he join to deployment with AP.You can try with MAC addresses for differend Radius.First try to add 2,4Ghz MAC address to table and then try to delete MAC address and try the same  with 5Ghz MAC addre...

Hi, There is no known bug regarding this issue.You can open a support case in Cisco Small Business TAC in which engineers will collect all required information from you like this posted in forum, packet capture, logs and etc. They will investigate th...

Hello,You firmware on AP and Mesh extender should be the same, you can try to upgrade mesh to same firmware version as AP.You also must be sure that devices are produced for the same region.