SharePoint 2013 search problem

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I looking for a help. I have a problem with the search service in Microsoft Sharepoint 2013. The error occurs both when trying to use the service in the content of the site and when trying to manage the service in Sharepoint Central Administration. I have tried to read, but none of the solutions I have found matches it. Could someone advise me what steps I should take?


In the CA when i try to configure Search application it appears something like that (I translate it): Base type Microsoft.Office.Server.Search.Internal.UI.SearchAdministrationis is not allowed on this website. Type not found Microsoft.Office.Server.Search.Internal.UI.SearchAdministration, Microsoft.Office.Server.Search, Version=, Culture=neutral, PublicKeyToken=71e9bce111e9429c  or it has not been registered as safe.

And in the technical details, corealtion ID is: 


In the MS Windows Server system event list, there is a critical level error for Timer (Timeserver?) with ID 6398, which repeats very frequently

Below is a line from ULSViewer, which probably has some helpful information.

12-08-2020 23:10:21.21 w3wp.exe (0x0F0C) 0x0F60 SharePoint Server Search Query ac3iq High Ims::EndPoints: old: , new:



Can someone please help me? I have recently had contact with SharePoint.

Thank you.

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