Modifying the "user" parameter of the kanbanboard macro on the WYSIWYG editor on the macro edit form does not work, the parameter changes are not applied.
After investigation I find that the issue is caused by a conflict on the displayer of the "user" parameter.
Basically the displayer of the "users" parameter of the userlist pro macro, of type com.xwiki.macros.internal.userlist.UserReferenceList, is used to edit the kanbanboard macro parameter, of type com.xwiki.task.UserReferenceList.
This conflict is caused by a limitation on the product which is only using the parameter type class name to define the parameter displayer. I reported this improvement ticket in the product to add the possibility to use the full class name : https://jira.xwiki.org/browse/XWIKI-24092.
That said, in order to fix the issue quickly the classname of the parameter type "com.xwiki.task.UserReferenceList" used on the kanbanboard macro should be modified to a different name (for example TaskUserReferenceList).
Note that this issue is also reproduced on the "taskgantt" macro which is also using the "com.xwiki.task.UserReferenceList" as parameter type.
Modifying the "user" parameter of the kanbanboard macro on the WYSIWYG editor on the macro edit form does not work, the parameter changes are not applied.
After investigation I find that the issue is caused by a conflict on the displayer of the "user" parameter.
Basically the displayer of the "users" parameter of the userlist pro macro, of type com.xwiki.macros.internal.userlist.UserReferenceList, is used to edit the kanbanboard macro parameter, of type com.xwiki.task.UserReferenceList.
This conflict is caused by a limitation on the product which is only using the parameter type class name to define the parameter displayer. I reported this improvement ticket in the product to add the possibility to use the full class name : https://jira.xwiki.org/browse/XWIKI-24092.
That said, in order to fix the issue quickly the classname of the parameter type "com.xwiki.task.UserReferenceList" used on the kanbanboard macro should be modified to a different name (for example TaskUserReferenceList).
Note that this issue is also reproduced on the "taskgantt" macro which is also using the "com.xwiki.task.UserReferenceList" as parameter type.