Kindly reply me please if someone have an good idea about this problem

Site created on wordpress is your first, and most pressing, problem.

But I digress...

I cannot decipher what exactly you are doing....but....

If it is worpdress/server/whatever problem, it will keep coming back.

There is never, ever, ever, any problem with 404 errors, unless your money pages suddenly cease to exist.

If that's the case, that's your lunacy, nothing else. You goofed them up.

But if you are talking something I touched on in the beginning.....
these are caused by google (or whomever) crawling your site at a particular time that some pages are created on the fly, only for that session.

Ahhh...sessions can be added to the list.

Those pages are never a problem....404 errors can never be gotten rid of in the real world.

I only mentioned half before. non-money/imporant pages that get a 404 are YOUR problem.
The other half of this is that you need a soft landing custom 404 error page.

Once that 404 custom error page is done...you are done and done with no worries.

Paul

you can confuse it

There is a big problem with your Permalinks setting, you can fix it by resetting your site.

Please don't worry, it's a common issue, ahh...actually it's not a issue I think!

It's a function page of the website when you type a link or visit a link of any site but the page is the absence of the time so this message will be showing. On the other hand, if the site permalink is not saved, so it can be showing.

WordPress creates a rewrite array that is responsible for managing permalinks, or "pretty URLs."

Improperly coded plugins, custom post types, and taxonomy alterations can break or corrupt the permalink array, thus causing 404s.

In computer network communications it indicates that the client was able to communicate with a given server, but the server could not find what was requested .

This is not a big issue. There might be problems with permalink. Just fix it by reviewing your site.

Redirect the link is the best way to solve this problem.

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Maybe any plugin occurring that issue.
Check all your plugins by deactivating and activating.

Thanks
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When the url is not matching to server URL then it gives 404 not found.

Sometime crawler do not crawl your link and the URL are different so It show 404 error..
You please check firstly that your URL is fetched or not

When a page URL no longer exists or is renamed, any links directing to the original URL will return a 404 webpage Not Found error. These errors are bad for seo and get negative impact on user because user get bad imapct related to site.

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