Error in Azure: Suggestion to correct

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

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

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