Clicking on "Subscribe" UI action in the articles in knowledge portal throws "Failing widget: 'Knowledge Article Content'" error message.Issue When the user clicks on the Subscribe UI action in the knowledge portal(kb), the widget throws the following error message "Server JavaScript error Method "toString" called on incompatible object.""Line number 170""Script source code logged to browser console""Failing widget: 'Knowledge Article Content' (a47ea1cb0b9432004ce28ffe15673a5b)" The same error is seen when the user tries to unsubscribe the knowledge article as well.ReleaseService portalCauseThe probable cause of the issue could be because of the customization of the script include 'KnowledgeAjax'.ResolutionTo resolve the issue, revert the script include 'KnowledgeAjax' to the OOB version.Related Linksknowledge_portal, article, subscribe, failing_widget