Try to use the REOPEN CAMS button in the take picture page, this will reset the SBC (single board computer) and it maybe possible to communicate with the camera after you do.
Check the camera is connected to the SBC on the B5 is located inside the bridge, remove X bellows to reach it, on A5 it's located behind the head, on top of the sprinkles under a yellow steel cover, check the SBC has power, and the network cable is connected, check the network switch in the electrical panel is on and connected, and the machine computer has proper fixed IP settings for the CNC and Camera network, you can reach the camera SBC via VNC at 192.168.50.101, if everything is turned on but you cannot reach the SBC, the SBC maybe damaged.