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Do you have a active schedule for your primary SSID ?Or other internet restrictions set ? (Access control / Website Filter)Looking into the emulator log, there is no restriction set and the router unlocks both wireless setup, so perhaps it is due to a schedule or filter.
Just looked into the menu of my DIR.In Advanced/WiFi Protected Setup you have the option to "Lock Wireless Security" after all devices have been configured.If this option is set you may get the message: "primary: Lock AP setup"