Unable to add content type "Link To a document" to library

Question

Hi I am trying to attach a Link to a Document content type to a document library of a subsite in sharepoint 2013 on premise site. But I couldn't because throwing a error.I have tried to attach the same content type to a library in root site throwing same error.Below is the error image and error we found but no idea of the error: System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.SharePoint.SPContentType.ProvisionFieldOnList(SPField field Boolean bRecurAllowed) at Microsoft.SharePoint.SPContentType.ProvisionFieldsOnList() at Microsoft.SharePoint.SPContentType.DeriveContentType(SPContentTypeCollection cts SPContentType& ctNew) at Microsoft.SharePoint.SPContentTypeCollection.AddContentTypeToList(SPContentType contentType) at Microsoft.SharePoint.SPContentTypeCollection.AddContentType(SPContentType contentType Boolean updateResourceFileProperty Boolean checkName Boolean setNextChildByte) at Microsoft.SharePoint.SPContentTypeCollection.Add(SPContentType contentType) at Microsoft.SharePoint.ApplicationPages.AddContentTypeToListPage.Update(Obj... 31fca84e-90db-435f-8de3-e4415e3f6758 Please help me out.

Nanddeep Nachan · Answer

Can you please list out: Major fields in your content type? Type of document library you are trying to attach this content type to?

Rajkiran Swain · Answer

Hello Swetha If is it possibel then please give me your system access i will fix it as soon as possible .

Prasham Sabadra · Answer

Hi Just one quick thought please check content type once if there is atleast one field in content type or its empty.

Swetha · Answer

Hi Manikadan I have done with Allow Management of content types as yes then only i tried to add from existing site content types after that only i faced the above issue. i need to add this content type in subsitewhen i did i got the issue  so I checked with parent site same issue i faced.What can be the possibilities of this issue.

Manikandan Murugesan · Answer

Select Yes for Allow management of content types  then select OK to save your changes. From the Document Library Settings page select Add from existing site content types . Choose Link to a Document from the list on the left then click Add  then OK to add the content type . Refer the following Link : https://its.uiowa.edu/support/article/103189/