Suddenly the KB articles that existed in the instance are gone. When trying to import the articles in XML file, the loading pop up appears, after a while the screen refreshes but the files are not imported. Issue Suddenly the KB articles that existed in the instance are gone. When trying to import the articles in XML file, the loading pop up appears, after a while the screen refreshes but the files are not imported. Apparently the error only occurs in this instance.CauseThe reason why import was failing was because property "glide.knowman.versioning.enabled" on the affected instance was set to false. To give you a bit of background - Query Business Rule - "Versioning : Exclude old versions" add the condition "latest=true" if versioning is disabled.On the instance we see that all the imported knowledge articles had "latest=false" and hence they were getting filtered if the versioning is disabled. After enabling this property all the articles were visible. ResolutionSo, to fix the issue 2 things can be done : If you are using knowledge versioning (If you have "Knowledge Management Advanced plugin "its highly likely you will use versioning)Then , "glide.knowman.versioning.enabled" should be set to true.Read more about it here - https://docs.servicenow.com/bundle/rome-servicenow-platform/page/product/knowledge-management/concept/article-versioning.html If somehow you are not using versioning, then the articles should have Latest = true.