Google webmaster "soft 404" errors

[msouefi]

hello
i am using v Bulletin Version 5.2.5 and a soft error keeps appearing on my google webmaster tool as in fig bellow:



showing that the url:
http://aqarspot.com/core is linking from the following pages in my website:

http://aqarspot.com/forum/saudi-prop...ده
http://aqarspot.com/forum/saudi-prop...yadh/land-sale
http://aqarspot.com/forum/saudi-prop...partments-rent
http://aqarspot.com/
http://aqarspot.com/forum/haraj/emir...ties/abu-dhabi
http://aqarspot.com/forum/general/im...اب
http://aqarspot.com/forum/haraj/emir...ي-vl_700
http://aqarspot.com/forum/saudi-prop...1593;ه-8
http://aqarspot.com/forum/egypt-prop...اب
http://aqarspot.com/forum/egypt-prop...e/shorouk-city

And the server returns a code other than 404 or 410 for a non-existent page (or redirecting users to another page, such as the homepage, instead of returning a 404). This creates a poor experience for searchers and search engines.

My question is how can i repair this error? And if this error effect search engine optimization.
thanks

[Dragonsys]

it is in your header:

<script type="text/javascript">
		if (location.hash) {
			document.write('<style type="text/css"> a.anchor { display:none;} <\/style>');
		}

		var uploadUrlTarget = "http://aqarspot.com/uploader/url";
		var pageData = {
			"baseurl": "http://aqarspot.com",
			"baseurl_path": "/",
			"baseurl_login": "http://aqarspot.com",
			"baseurl_core": "http://aqarspot.com/core",
			"pageid": "1",
			"pagetemplateid": "1",
			"channelid": "1",
			"nodeid": "1",
			"userid": "0",
			"textDirLeft": "right",
			"textDirRight": "left",
			"textdirection": "rtl",
			"can_use_sitebuilder": "",
			"cookie_prefix": "bb",
			"cookie_path": "/",
			"cookie_domain": "",
			"sb_state_cookie": "bbsitebuilder_active",
			"inlinemod_cookie_name": "inlinemod_nodes",
			
				"pagenum": "1",
			
			"styleid": "0",
			
				"languageid": "2",
			
			"threadmarking": "2",
			"lastvisit": "1482507985",
			"phrasedate": "1482236238",
			"optionsdate": "1481476259",
			
			"current_server_datetime": "1482507985",
			"simpleversion": "v=525",
			
			"showhv_post": "1",
			
			"nextcron": "1482508200",
			"securitytoken": "guest"
		}
		
		

	</script>

You might start there. Looks to be part of your vb settings. I'm not familiar with vb5 so I can't really help much more than that.

Check and see if the folder core exists in your public_html, it seems like it might have a blank index file in it, as it does not return any errors, just a blank page.