Where do I reply on a page that something is wrong in the code?

https://ccm.net/faq/6132-batch-file-to-get-ip-address
on the above page, I found a method described of getting my IP address.

I tried that and found that it is not working.

Now, where on the page do I reply that something is wrong in the code?

otherwise, why you think you are running a forum if communication is not allowed?

Thanks.
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Rawat