Please note that the Applied Innovations servers are production servers and the server your site is served by is utilized by as many as 250 other websites. For this reason the Applied Innovations servers are not to be used as a development platform and this may result in account termination or suspension. However, sometimes when publishing from a development platform to a production platform certain changes may need to be made and could result in potential errors and we understand this.
To enable remote error messages to be displayed in a browser, edit your Web.Config file and enable customErrors by setting the following:
<customErrors mode=”Off” />
Please note that much of ASP.net is case sensitive as is the web.config file.
Content retrieved from: https://support.appliedi.net/kb/a374/how-do-i-enable-my-asp_net-application-to-show-me-remote-error-messages.aspx.