Exception Details: System.Web.HttpException: Request is not available in this context

Exception Details: System.Web.HttpException: Request is not available in this context

http://mvolo.com/iis7-integrated-mode-request-is-not-available-in-this-context-exception-in-applicationstart

I agree with the options given:

Change your application code to not use the request context (recommended).
Move the application to Classic mode (NOT recommended).
Change your application code to not use the request context (recommended).
OR:
Move the application to Classic mode (NOT recommended).