This is something on your network, the problem is not with WIFI. I suggest that you review your network to validate who may be sending this splash page, especially because it is an external splash page, not the standard Meraki one. ... View more

Imagino que implementaste un portal cautivo en esos SSID que creaste en el dashboard meraki, lo que puedes probar es quitar esa opción en la configuración del SSID. Custom Splash Page Themes - Cisco Meraki Documentation ... View more

Have you got a Meraki MX?  Maybe it is configured to do a splash page. https://documentation.meraki.com/General_Administration/Cross-Platform_Content/Splash_Page#MX_Splash_Page_Options  ... View more