Web Console - Error message "Server Error in '/ULAdmin' Application".

If the error message displayed in the Internet browser is:

Server Error in '/ULAdmin' Application
No encryption provider available!
The provider 1 gives the error 00000002
The provider 12 gives the error 00000002
The provider 24 gives the error 00000002

Then to fix this issue:

• Open IIS Manager console.
• Display the Advanced settings of the UserLock Application pool named by default UserLockAppPool.
• Set the option Load User Profile to True.
• Validate by clicking on OK.
• Open the UserLock Web Console.

If the error message displayed in the Internet browser is:

Server Error in '/ULAdmin' Application
Runtime error

And meanwhile, if you try to browse the UserLock Web console directly from Internet Information Services (IIS) manager console, it displays this error message: The current identity (NT AUTHORITY\NETWORK SERVICE) does not have write access to 'c:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files'

Then the problem comes from the Network Service which doesn't have sufficient rights.

You can grant access to this account explicitly using the aspnet_regiis -ga switch, for example:
C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319>aspnet_regiis -ga "NT Authority\Network Service"