When you create folders in the tree pane from any view, you need to ensure that you do not use certain special characters. The usage of special characters is not allowed in cases where a folder is created dynamically by the name of some value.
You create a Post Rule. Add an action to move the assets to the folder. You choose to create the folder dynamically based on the name of the value of the selected field. In this case, if the value of the field contains a special character that is not supported the folder is created with a different name.