It was a pleasure to help you. Guys, just to let you know that I was helping @mcoomber closely, one of the things that was missing was to create VLAN 30 on a 3850 switch that was between the MX and the MS. In addition, not all APs had the switch port configured for trunk, which was also causing the problem (this was confirmed by Meraki). So in short, it wasn't just about allowing VLAN 30 in the SSID and configuring trunk on the ports, it was still necessary to configure the VLAN on the Catalyst switch.
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