System.PlatformNotSupportedException: This operation requires IIS integrated pipeline mode.
Solution 1 to resolve this issue,
It might help you to solve this issue, click on the project file and go to properties. Under managed pipeline, you changed the property value from classic to integrate.
Solution 2 to resolve this issue,
Your Application Pool is in classic mode but your Application need integrated mode to fire. change it to Integrated Mode:
1. Go to Open IIS Manager
2. Go to Application Pool
3. Now, select pool that your app is run in it
4. Go to right panel select Basic Setting
5. Now, Manage Pipeline Mode change to Integrated
Solution 3 to resolve this issue,
It might help you to solve this issue doing the following:
1. In Visual Studio, select Project properties
2. Select the Web Tab
3. Select Use Local IIS Web server
4. Check Use IIS Express