Hello, there are some funtions in the Umbraco UI that aren't working, such as inserting a macro on a page, editing on canvas (the page shows on canvas but when you want to edit it doesn't allow, you keep clicking on the editable parts but nothing happens), changing/installing of skins (after installing a skin once, I can't can't change it again, also the skin editor does not come up)

Please I need help!!!!!!!