It is workings now! I keep the same configuration but I uncheck all option about NAS Porty Type and did a reboot on the NPS service instead of the server itself. Windows and its need of random reboots rsrrsrs Thank you guys !!
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Here is a specific configuration guide covering what you are doing. https://documentation.meraki.com/MR/Splash_Page/Configuring_RADIUS_Authentication_with_a_Sign-on_Splash_Page
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