Remote access needs a subscription
Agent DVR
You're connecting to Agent DVR from outside its local network. That's remote access, which comes with an Agent DVR subscription.
Agent DVR is free to use on your own network. Remote access is different because it takes real infrastructure to run every day: the relay servers that connect you securely from anywhere without opening ports, the iOS and Android apps, push notifications, and the people who answer your support questions. Subscriptions keep all of that running and pay for Agent DVR's ongoing development.
Already subscribed? See Remote Access for how to connect.
On your home network? Open Agent DVR using its local address instead, one starting with 192.168, 10. or 172.16 to 172.31. A VPN such as Tailscale can make a local connection look remote. Connecting from 10.250.0.5.