You have to map the created meshpoint to one of the radios.
Go into one of the radio interfaces in the CLI and enter: meshpoint
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Or in the GUI, go into the AP Profile, Radios, WLAN Mappping/Mesh Mapping tab, then select the Meshpoint you created and click the arrow to add it to the radio.
Note though, you want the meshpoint to be BSS1. Ideally, you want the Meshpoint to be the only thing mapped to a radio (don't want to serve clients and also operate with mesh at the same time)