Hello,
Thank you for the Troubleshoot file!
From what I can see, your security camera is in the 192.168.0.0 subnet, while the LAN is set to the 192.168.1.0/24 subnet.
To fix this, static IP needs to be set in the camera, which would be in the correct subnet. This could be achieved by setting the static IP on the PC to 192.168.0.10 and the subnet mask to 255.255.255.0. Then cameras' WebUI should be accessible by navigating to 192.168.0.20. Instructions on how to set a static IP on Windows or Ubuntu machines can be found in the respective articles.
Another (and easier if you don't have any more devices with static IP connected) way would be to set the LAN subnet of the router to 192.168.0.0/24 subnet. On the legacy WebUI, this can be done by navigating to Network -> LAN and setting the IP address to 192.168.0.1.
Please keep in mind, that if the camera IP will be changed, then it can be set to anything in the range of 192.168.1.2 - 192.168.1.254 (assuming you don't have any more static IPs that could cause an IP conflict).
Let me know if any more help is needed!
Best regards,
DaumantasG