Error connecting to PLC: Error: connect EHOSTUNREACH

I'm currently connecting from node-red to Aubobot through TCP in node-red but node-red shows disconnected and connected frequently, and it shows an error connecting to PLC I have no idea what is this and how to solve it. Also, I can't get any data out of the AUBO. I am able to ping AUBO IP from my computer and have checked the lan cable connection. I have also tried restarting node-red but the problem still persists. I would appreciate any help!