Did you try a factory reset of the AP? I would start with that. https://documentation.meraki.com/General_Administration/Support/Resetting_Cisco_Meraki_Devices_to_Factory_Defaults#:~:text=MR%20Access%20Points,-Outdoor%20Access%20Points&text=To%20reset%20an%20outdoor%20Access,point%20for%2010%2D15%20seconds. Also check the DHCP setting...is the GW the right one and reachable.
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