When you try to create sites based on Projects web or issues web templates or matter of fact an web based templates, you might run into error as seen below
Preparing Site …
Someone has recently made changes to this site and the site is being updated. If the site remains offline for an extended period of time, contact a site owner.

Wait a moment and refresh your browser

Access Service Error


you have to make sure you did the following:

  1. Created a Access Service Application
    (Central Administration – Manage Service Applications – New – Access Services)
  2. Started the Access Database Service
    (Central Administration – Manage Services on Server)
  3. then open up the SharePoint 2010 Management Shell, and give the following powershell command: enable-spSessionStateService –DataBaseName <SomeNewDatabaseName>

above command will create a session state database and turns on the session state service.

Refresh your browser and you are  all set to go
Happy coding !!!