Error in IT Shop search

Hello group!!

Today all the searches in the IT Shop throws an Exception.

If I click in every search button the following error appears:

"The service connection could not be created. Check the connection information for AutoUpdateUserAuth, or reinstall the web application.
Application server returned an error.
An error occurred."
Same error but in a distinct search textbox:
"An exception has occurred while running the form method Popup0_Popup0_ControlRef1_Container9_ObjectSwitchContainer1_GridBand1_gridLoader_ctl02_GridSearchBox.
The service connection could not be created. Check the connection information for AutoUpdateUserAuth, or reinstall the web application.
Application server returned an error.
An error occurred."
I have restarted the Application pool and the Application itself in the IIS but the problem persists. (OneIdentity version 8.2)
Any Idea on what could be wrong?
Kind regards,
David.