Errors updating from Orion 8.1 to Orion 8.5

I´m trying to update the Orion but when the wizard is runnig I got the next error.

Could you post the relevant lines in your ConfigurationWizard.log file? Depending on where you installed Orion it's usually located in "C:\program files\solarwinds\orion\ConfigurationWizard.log". This log file should provide some insight as to what the problem is.

2007-12-19 17:48:19,761 [1] DEBUG IISHelper - Restarting ASP.Net Application by updating "C:\Inetpub\SolarWinds\web.config".
2007-12-19 17:48:19,781 [1] ERROR IISHelper - Unable to restart ASP.Net application.
System.IO.FileNotFoundException: No se pudo encontrar el archivo 'C:\Inetpub\SolarWinds\web.config'.
Nombre de archivo: 'C:\Inetpub\SolarWinds\web.config'
   en System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
   en System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy)
   en System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options)
   en System.IO.StreamReader..ctor(String path, Encoding encoding, Boolean detectEncodingFromByteOrderMarks, Int32 bufferSize)
   en System.IO.StreamReader..ctor(String path, Encoding encoding)
   en System.IO.File.ReadAllText(String path, Encoding encoding)
   en SolarWinds.ConfigurationWizard.Common.IISHelper.RestartAspNetApplication(IOrionConfigHost host)
2007-12-19 17:48:19,961 [1] INFO  ConfigurationProgressScene - Restarting Website ...
2007-12-19 17:48:20,532 [1] INFO  ConfigurationProgressScene - Updating website configuration file ...
2007-12-19 17:48:20,582 [1] DEBUG IISHelper - Updating website configuration stored in "C:\Inetpub\SolarWinds\web.config".
2007-12-19 17:48:20,702 [1] ERROR ConfigurationProgressScene - Exeception while configuring plugins.
System.IO.FileNotFoundException: No se puede cargar el archivo o ensamblado 'OrionWeb' ni una de sus dependencias. El sistema no puede hallar el archivo especificado.
Nombre de archivo: 'OrionWeb'
   en System.Reflection.Assembly._nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection)
   en System.Reflection.Assembly.nLoad(AssemblyName fileName, String codeBase, Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection)
   en System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection)
   en System.Reflection.Assembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection)
   en System.Activator.CreateInstance(String assemblyName, String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, Evidence securityInfo, StackCrawlMark& stackMark)
   en System.Activator.CreateInstance(String assemblyName, String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, Evidence securityInfo)
   en System.AppDomain.CreateInstance(String assemblyName, String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, Evidence securityAttributes)
   en System.AppDomain.CreateInstance(String assemblyName, String typeName, Boolean ignoreCase, BindingFlags bindingAttr, Binder binder, Object[] args, CultureInfo culture, Object[] activationAttributes, Evidence securityAttributes)
   en SolarWinds.ConfigurationWizard.Common.IISHelper.UpdateWebConfigFile(IOrionConfigHost host)
   en SolarWinds.ConfigurationWizard.Host.ConfigurationProgressScene.DoUpdateConfig()

AVS: El registro del enlace de ensamblado está desactivado.
Para habilitar el registro de errores del enlace de ensamblado, establezca el valor de Registro [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) como 1.
Nota: existe una disminución del rendimiento asociada registro de errores del enlace de ensamblado.
Para desactivar esta característica, elimine el valor de Registro [HKLM\Software\Microsoft\Fusion!EnableLog].

I already did that....I passed the error but when I tried to see another view at the menu bar (events, reports, overview) I saw the views without format......just like plain text.