Hello, I am new to DNN and am trying to upgrade from 5.2.3 to 5.3.0 but everytime I run the upgrade when I try to access my installation I get:

Server Error in '/dotnetnuke' Application.

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Security Exception

 

 

Description: The application attempted to perform an operation not allowed by the security policy.  To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file. 

Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Web.AspNetHostingPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace: 

[SecurityException: Request for the permission of type 'System.Web.AspNetHostingPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.] System.RuntimeTypeHandle._GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark, Boolean loadTypeFromPartialName) +0 System.RuntimeTypeHandle.GetTypeByName(String name, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark) +62 System.RuntimeType.PrivateGetType(String typeName, Boolean throwOnError, Boolean ignoreCase, Boolean reflectionOnly, StackCrawlMark& stackMark) +42 System.Type.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase) +77 System.Web.Compilation.BuildManager.GetType(String typeName, Boolean throwOnError, Boolean ignoreCase) +105 System.Web.Configuration.ConfigUtil.GetType(String typeName, String propertyName, ConfigurationElement configElement, XmlNode node, Boolean checkAptcaBit, Boolean ignoreCase) +64

I need to upgrade because the 5.2.3 version is not able to install modules from manifest which I am needing to do.

If anyone has any ideas on how to solve this problem I would greatly appreciate it! Thank you!

I am running on Windows 7, IIS 7.5. Do you mean the folder permissions? The NETWORK SERVICE user still has the correct permissions. 5.2.3 was working, but when I put the upgrade package over it I get that error.

 Hmm, That's the first time I heard that, Thanks! I've removed the Network Service permission, and checked the DefaultAppPool user, it was already configured for full control. I am still receiving the same error though.