This collection already contains an address with scheme http. There can be at most one address per scheme in this collection

<serviceHostingEnvironment aspNetCompatibilityEnabled="true">
    <baseAddressPrefixFilters>
        <add prefix="http://www.blabla.com/"/>
    </baseAddressPrefixFilters>
</serviceHostingEnvironment>

You encounter this error in the web.config file and enter the above code in the part.