I can see the error here:
Source Error:
Line 1062: -->
Line 1063: </system.webServer>
Line 1064: <system.web.extensions>
Line 1065: <scripting>
Line 1066: <scriptResourceHandler enableCompression="true" enableCaching="false"/>
Source File: \\clfs\customers\webroot\o\w\owner003\primary\www\web.config Line: 1064
Version Information: Microsoft .NET Framework Version:2.0.50727.3615; ASP.NET Version:2.0.50727.3614
it means you upgraded using the mojoPortal package for .NET 4 but you are running in .NET 3.5, if your hosting suports .NET 4 you should change it to .NET 4 in your hosting control panel, otherwise you should re-install using the mojoPortal package for .NET 3.5.
See the first 2 items in the FAQ
http://www.mojoportal.com/faq.aspx
Hope it helps,
Joe