Thank you so much for your insight. So, I tried to establish a TCP server/client communication and I'm facing an issue. The code is correct, and it runs fine. But when I integrate it with gui guider and try to run it.

I also tried to run it in cmd, also faced a similar error.

I don't know how to resolve it.
If possible, can you give me a sample project on how to establish it.
@Harry_Zhang Would very much appreciate your help.