I'm also getting similar errors after the upgrade (same platform as o.p.). First I posted from Windows Live Writer and got this error:

Server Error 12 Occurred

Create new post failed.  Error: The type initializer for 'mojoPortal.SearchIndex.IndexBuilderManager' threw an exception.

With this in the sysem log:

2013-02-14 09:20:51,306 ERROR 192.168.54.5 - en-US - /metaweblogapi.ashx - mojoPortal.Web.BlogUI.metaweblogapi - mojoPortal.Core.API.MetaWeblog.MetaWeblogException: Create new post failed.  Error: The type initializer for 'mojoPortal.SearchIndex.IndexBuilderManager' threw an exception.
   at mojoPortal.Web.BlogUI.metaweblogapi.NewPost(String blogId, String userName, String password, MWAPost sentPost, Boolean publish)
   at mojoPortal.Web.BlogUI.metaweblogapi.ProcessRequest(HttpContext context)

I found that the post had been created on the site, but could not be viewed (by clicking the post title). We get a 404.

Editing the post within the site is possible, but on saving it bombs and we get this in the log:

2013-02-14 09:22:17,095 ERROR 192.168.54.5 - en-GB - /Blog/EditPost.aspx?pageid=138&ItemID=204&mid=108 - mojoPortal.Web.Global -  Referrer(http://www.esdmdata.co.uk/Blog/EditPost.aspx?pageid=138&ItemID=204&mid=108) useragent Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; BOIE9;ENUS)
System.Configuration.ConfigurationErrorsException: Could not load type 'mojoPortal.Business.WebHelpers.IndexBuilderProvider' from assembly 'mojoPortal.Business.WebHelpers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'. ---> System.TypeLoadException: Could not load type 'mojoPortal.Business.WebHelpers.IndexBuilderProvider' from assembly 'mojoPortal.Business.WebHelpers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
 

Hi,

Unfortunately that didn't provide a solution for the problem I was experiencing. I have redone the upgrade with both mojoportal and calendar pro. Unfortunately I've made things worse as I have now no wysiwg editor either.

Any help on where to go from here would be appreciated.

I wasn't too sure of how much of the system log was required.

The system log is:

2013-02-15 05:25:38,964 ERROR 110.142.145.79 - en-GB - /Blog/EditPost.aspx?pageid=70&ItemID=78&mid=132 - mojoPortal.Web.Global -  Referrer(http://www.creativestrand.com.au/Blog/EditPost.aspx?pageid=70&ItemID=78&mid=132) useragent Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_5) AppleWebKit/536.26.17 (KHTML, like Gecko) Version/6.0.2 Safari/536.26.17
System.Configuration.ConfigurationErrorsException: Could not load type 'mojoPortal.Business.WebHelpers.IndexBuilderProvider' from assembly 'mojoPortal.Business.WebHelpers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'. ---> System.TypeLoadException: Could not load type 'mojoPortal.Business.WebHelpers.IndexBuilderProvider' from assembly 'mojoPortal.Business.WebHelpers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
   at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMarkHandle stackMark, Boolean loadTypeFromPartialName, ObjectHandleOnStack type)
   at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark, Boolean loadTypeFromPartialName)
   at System.Type.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase)
   at System.Web.Compilation.BuildManager.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase)
   at System.Web.Configuration.ConfigUtil.GetType(String typeName, String propertyName, ConfigurationElement configElement, XmlNode node, Boolean checkAptcaBit, Boolean ignoreCase)
   --- End of inner exception stack trace ---
   at System.Web.Configuration.ConfigUtil.GetType(String typeName, String propertyName, ConfigurationElement configElement, XmlNode node, Boolean checkAptcaBit, Boolean ignoreCase)
   at System.Web.Configuration.ProvidersHelper.InstantiateProvider(ProviderSettings providerSettings, Type providerType)
   at System.Web.Configuration.ProvidersHelper.InstantiateProviders(ProviderSettingsCollection configProviders, ProviderCollection providers, Type providerType)
   at mojoPortal.SearchIndex.IndexBuilderManager.Initialize()
2013-02-15 05:38:26,136 INFO (null) - (null) - (null) - mojoPortal.Web.Global - Global.asax.cs Application_End
2013-02-15 05:38:47,902 INFO (null) - (null) - (null) - mojoPortal.Web.Global - Application Started.
2013-02-15 05:46:53,339 INFO (null) - (null) - (null) - mojoPortal.Web.Global - Global.asax.cs Application_End
2013-02-15 05:50:13,152 INFO (null) - (null) - (null) - mojoPortal.Web.Global - Application Started.
2013-02-15 05:51:04,152 INFO (null) - (null) - (null) - mojoPortal.Web.Global - Global.asax.cs Application_End
2013-02-15 05:51:57,199 INFO (null) - (null) - (null) - mojoPortal.Web.Global - Application Started.
2013-02-15 05:54:53,777 INFO (null) - (null) - (null) - mojoPortal.Web.Global - Global.asax.cs Application_End
2013-02-15 05:55:04,902 INFO (null) - (null) - (null) - mojoPortal.Web.Global - Application Started.

Hi Joe,

I have updated the Web Calendar pro, cleared the log and sent you the new log.

Thankyou.

2013-02-15 06:25:07,386 INFO (null) - (null) - (null) - mojoPortal.Web.Global - Global.asax.cs Application_End
2013-02-15 06:25:30,449 INFO (null) - (null) - (null) - mojoPortal.Web.Global - Application Started.
2013-02-15 06:26:37,058 ERROR 110.142.145.79 - en-US - /omg3.aspx - mojoPortal.Web.PageNotFoundHttpModule - Referrer(http://annmarierudd.creativestrand.com.au/blog.aspx)  PageNotFoundHttpModule handled error.
System.Web.HttpException (0x80004005): The file '/omg3.aspx' does not exist.
   at System.Web.Compilation.BuildManager.GetVPathBuildResultInternal(VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate)
   at System.Web.Compilation.BuildManager.GetVPathBuildResultWithNoAssert(HttpContext context, VirtualPath virtualPath, Boolean noBuild, Boolean allowCrossApp, Boolean allowBuildInPrecompile, Boolean throwIfNotFound, Boolean ensureIsUpToDate)
   at System.Web.Compilation.BuildManager.GetVirtualPathObjectFactory(VirtualPath virtualPath, HttpContext context, Boolean allowCrossApp, Boolean throwIfNotFound)
   at System.Web.Compilation.BuildManager.CreateInstanceFromVirtualPath(VirtualPath virtualPath, Type requiredBaseType, HttpContext context, Boolean allowCrossApp)
   at System.Web.UI.PageHandlerFactory.GetHandlerHelper(HttpContext context, String requestType, VirtualPath virtualPath, String physicalPath)
   at System.Web.HttpApplication.MaterializeHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
2013-02-15 06:27:31,511 ERROR 110.142.145.79 - en-US - /Blog/EditPost.aspx?pageid=294&mid=484 - mojoPortal.Web.Global -  Referrer(http://annmarierudd.creativestrand.com.au/Blog/EditPost.aspx?pageid=294&mid=484) useragent Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_5) AppleWebKit/536.26.17 (KHTML, like Gecko) Version/6.0.2 Safari/536.26.17
System.Configuration.ConfigurationErrorsException: Could not load type 'mojoPortal.Business.WebHelpers.IndexBuilderProvider' from assembly 'mojoPortal.Business.WebHelpers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'. ---> System.TypeLoadException: Could not load type 'mojoPortal.Business.WebHelpers.IndexBuilderProvider' from assembly 'mojoPortal.Business.WebHelpers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'.
   at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMarkHandle stackMark, Boolean loadTypeFromPartialName, ObjectHandleOnStack type)
   at System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark, Boolean loadTypeFromPartialName)
   at System.Type.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase)
   at System.Web.Compilation.BuildManager.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase)
   at System.Web.Configuration.ConfigUtil.GetType(String typeName, String propertyName, ConfigurationElement configElement, XmlNode node, Boolean checkAptcaBit, Boolean ignoreCase)
   --- End of inner exception stack trace ---
   at System.Web.Configuration.ConfigUtil.GetType(String typeName, String propertyName, ConfigurationElement configElement, XmlNode node, Boolean checkAptcaBit, Boolean ignoreCase)
   at System.Web.Configuration.ProvidersHelper.InstantiateProvider(ProviderSettings providerSettings, Type providerType)
   at System.Web.Configuration.ProvidersHelper.InstantiateProviders(ProviderSettingsCollection configProviders, ProviderCollection providers, Type providerType)
   at mojoPortal.SearchIndex.IndexBuilderManager.Initialize()

Hi Joe,

STS_EventCalendar     3.4.1.1
 

2.3.9.5 MSSQL
Operating System Microsoft Windows NT 6.1.7601 Service Pack 1
ASP.NET Info v4.0.30319 Running in Full Trust

contactform     0.0.0.6
eventcalendar     0.0.0.6
feed-manager     0.0.1.0
forums     2.2.0.2
imagegallery     0.0.0.8
kdmediaplayer     1.0.0.1
linksmodule     0.0.0.9
MegaGallery     0.0.0.7
pollfeature-byChristianFredh     0.0.0.5
sharedfiles     0.0.1.0

surveyfeature     1.8.0.0
webstore     0.0.7.3

Thankyou.