Confirm publish modal is not rendering on custom workspace.DescriptionConfirm publish modal is not rendering on custom workspace. Steps to Reproduce Create a public knowledge base with user criteria (AnyUser CanRead + empty CanNot Read)Install the App Engine Studio (AES) application (com.snc.app-engine-studio)Create custom workspace from App Engine StudioCreate an article and set the knowledge base created in step no (1).Try to publish the article nothing happens. Expected behaviour: It should be able to publish Actual behaviour: Nothing happened Root Cause: Confirm publish modal page and related routes are not present on custom workspace.Workaround Open the UIB and select the workspace which you have created.Create new page and select ‘Confirm publish modal’ from legacy templates and click on ‘Use template’. Once we have selected the template, add below details, and click on ‘continue’. Then click on ‘looks good’. Set the variant name and click on ‘Create’. Go to ‘experience’ in your workspace. Click on ‘view settings’ of confirm publish modal page. Add ‘table’ and ‘sysId’ as required parameters and save it. Now check is there any Record page present specific to knowledge in experience tab of your workspace. If ‘YES’, then open ‘Knowledge Record page’ record and go to ‘settings’ and see the ‘Actions’ and now click on ‘Page definition’ it will open the ‘Macroponent’ record. Copy the ‘sys_id’ for that UX Macroponent Definition. If ‘NO’ then open ‘Record default’ record and go to ‘page definition’ and copy the ‘sys_id’ of that UX Macroponent Definition. Now go to workspace experience then click on ‘settings’ and then click on ‘Open app conifig’ link it will open the UX App Config record for your workspace. Under UX App Routes related list, search for ‘Confirm Publish Modal Page’ and open it. Click ‘Insert and Stay’ and change the ‘Name’, ‘Parent Macroponent’ and ‘Parent Macroponent Composition Element ID’ as per below and click on ‘Update’ button, so that it will create one more app route entry. In ‘Parent Macroponent’ click on the search icon and filter it via ‘sys_id’ copied in Step No. (8) and select the macroponent. Now clear browser cache and try to ‘publish’ the same article again, it will open the confirm publish modal. Related Problem: PRB1654964