IIS Error

In the process of setting up Sitefinity 5.3 Trial for access by other users, every time I try to access localhost, it returns an error saying "Handler "WildCard32" has a bad module "IsapiModule" in its module list". 

The potential causes for this are listed as Handler "WildCard32" has a bad module "IsapiModule" in its module listed as incomplete installation of ASP.NET which isn't true because I've cross checked the installation and it's complete, and another reason is listed as a typographical error which I've confirmed to be not the case.

How do I proceed?

Hi,

Thank you for contacting Telerik Support.

I'm sorry to hear about the problems you've experienced running your project. Can you please confirm if you have everything registered in IIS as described in this article of our Installation and Administration guide and inform us if the issues persist?
Alternatively you can try moving the wildcard handlers to the bottom of the handlers section in web.config

<add name="WildCard" path="*" verb="*" modules="IsapiModule" scriptProcessor="%windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_isapi.dll" resourceType="Unspecified" requireAccess="None" preCondition="classicMode,runtimeVersionv4.0,bitness64" />

      <add name="WildCard32" path="*" verb="*" modules="IsapiModule" scriptProcessor="%windir%\Microsoft.NET\Framework\v4.0.30319\aspnet_isapi.dll" resourceType="Unspecified" requireAccess="None" preCondition="classicMode,runtimeVersionv4.0,bitness32" />

The web.config should be looking like

<add name="Telerik_Web_UI_DialogHandler_aspx" verb="*" preCondition="integratedMode" path="Telerik.Web.UI.DialogHandler.aspx" type="Telerik.Web.UI.DialogHandler" />

     <add name="Telerik.ReportViewer.axd_*" verb="*" preCondition="integratedMode" path="Telerik.ReportViewer.axd" type="Telerik.ReportViewer.WebForms.HttpHandler, Telerik.ReportViewer.WebForms" />

     <add name="WildCard" path="*" verb="*" modules="IsapiModule" scriptProcessor="%windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_isapi.dll" resourceType="Unspecified" requireAccess="None" preCondition="classicMode,runtimeVersionv4.0,bitness64" />

     <add name="WildCard32" path="*" verb="*" modules="IsapiModule" scriptProcessor="%windir%\Microsoft.NET\Framework\v4.0.30319\aspnet_isapi.dll" resourceType="Unspecified" requireAccess="None" preCondition="classicMode,runtimeVersionv4.0,bitness32" />

   </handlers>

   <staticContent>

Write back if the issue still persist after making the change in web.config.