HTTP Error 500.19 Internal Server Error - Config Error: The configuration section ‘system.webServer’ cannot be read because it is missing a section declaration

I have a client that asked me to install a application on a server that requires IIS. I ran everything and the application launches, but I get a error when visiting the site.

HTTP Error 500.19 Internal Server Error The requested page cannot be accessed because the related configuration data for the page is invalid

Module: IIS Web Core Notification: Unknown Handler: Not yet determined Error Code: 0x80070032 Config Error: The configuration section ‘system.webServer’ cannot be read because it is missing a section declaration Config file: \\?\(path)\web.config

Config Source: 36: <system.webServer. 37: <Handlers>

According to the instructions for the software, I needed to add the following lines in the config;

<system.webServer>
   <Handlers>
         <add verb="*" path="gotocode.aspx" type="AMA_API.Handlers.GoToCode, AMA_API" />
         <add verb="*" path="GoToInteraction.aspx" type="AMA_API.Handlers.GoToInteraction, AMA_API" />
         <add verb="*" path="Interaction.aspx" type="AMA_API.Handlers.Interaction, AMA_API" />
         <add verb="*" path="MCRules.aspx" type="AMA_API.Handlers.MCRules, AMA_API" />
         <add verb="*" path="Notes.aspx" type="AMA_API.Handlers.Notes, AMA_API" />

</Handlers>

</system.webServer>

From what I can tell, it is not even getting past the <system.webServer>. I am not that familiar with coding. Everything that I found and tried did not fix the issue.

Thanks.