I removed the link from your post. That was not necessary to answer.
The best thing to do: ask the company or person that programmed your site to solve this. Since 404 usually isn't a data error, it's clear that you miss the necessary knowledge yourself.
Hi Guys, I have a website. We are receiving some data error 404 on our site. I don't know, i have already trash all the links those were generating this issue. Tell me the another way how can i track my issue.

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