Nothing seemingly changed after both test and apply.
I initially thought it might be incompatibilities with ISP and my hardware but via Charters compatibility page, they should talk to each other without a problem.
Can it be that the ISP "blocked" Orbi's MAC address! I've seen this before. For troubleshooting purpose, under "Router MAC Address" please choose "Use Computer MAC address" (if you're accessing Orbi from a computer) or select "use this MAC address" and just copy the MAC address of one of your satellites, and click Apply.
My Setup | Internet Fiber ONT 250↓/250↑ | ISP Telenor | Wifi Router Orbi RBR850 + RBS850 + 2x RBS750 + 3xRBS350, Wired/Wireless BH / Orbi RBR50 + 6x RBS50 + RBS40V + RBS50Y, Wired/Wireless BH | Switches NG GS208 | Time Zone CET (Sweden)