You may sometimes receive the below error if adding a new library to an existing project. It is also a common error when running older applications originally built for IIS 6 on newer versions of IIS.
HTTP Error 500.22 – Internal Server Error
An ASP.NET setting has been detected that does not apply in Integrated managed pipeline mode.
Luckily there are a couple of easy solutions to fixing this error:
If you have a Web Part causing errors on a page in SharePoint, then you probably need a way to delete or reset the Web Part so that you can access the page again. Luckily there is a quick and easy way to do that by adding a parameter to the URL. All you need to do is append
?Contents=1 to the end of the URL to the page.
In this example we will use a SharePoint list as a data source in a SSRS report using SQL Server 2012 Report Builder.
Begin by adding a new data source to your report. Select Microsoft SharePoint List under the connection type dropdown. For the connection string you will want to enter the root URL for your site/subsite. For example, if the URL for our list is
http://technicaloverload.com/My-Test-List/, then you would enter
http://technicaloverload.com/ in the connection sting box.