Question

I am getting an error like this all other pages working perfectly but getting error I have added new page in my website locally this is working

Server Error in ‘/’ Application.

Runtime Error Description: An application error occurred on the
server. The current custom error settings for this application prevent
the details of the application error from being viewed remotely (for
security reasons). It could, however, be viewed by browsers running on
the local server machine.

Details: To enable the details of this specific error message to be
viewable on remote machines, please create a tag within
a “web.config” configuration file located in the root directory of the
current web application. This tag should then have its
“mode” attribute set to “Off”.

<!-- Web.Config Configuration File -->

<configuration>
    <system.web>
        <customErrors mode="Off"/>
    </system.web>
</configuration>

Notes: The current error page you are seeing can be replaced by a
custom error page by modifying the “defaultRedirect” attribute of the
application’s configuration tag to point to a custom
error page URL.

<!-- Web.Config Configuration File -->

<configuration>
    <system.web>
        <customErrors mode="RemoteOnly" defaultRedirect="mycustompage.htm"/>
    </system.web>
</configuration>

Answer 1

If you want to know what the error is, change your web.config file like so:

 <configuration>
     <system.web>
         <customErrors mode="Off"/>
     </system.web>
 </configuration>

Basically, the error you’re getting is telling you to do this so that you’ll be able to see the actual error.

Warning: If your website is out there on the internet, then anyone who tries to view will see the exact error message. This may be a security problem, since it might enable people to see parts of your code or even configuration.