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Forum Discussion
Uanable to Join network "NETGEAR_EXT" Network - Exrender not found
MAC OS SEQUOIA V15.11 Installed Network hardware - Netgear Orbi RBK852 Tri Mesh Router & Satellite
Wow, your description left a lot to be desired.
You posted about a _ext network but that you have an RBK852 which isn't an extender.
Maybe a better description of what you have for your setup, what you're trying to do, and where it fails would help us to help you better.
Problem resolved - re booted Router & Wifi Extender
might mark it solved then so others aren't still trying to fix it