I've installed SMF shop in clear SMF 2.0.15 and I get this error always when I press "edit" in shop administration>add/edit/delete items:
Fatal error: require(): Failed opening required <myhostlink>/httpdocs/Sources/shop/items/changedisplayname.php' (include_path='.:') in <myhostlink/httpdocs/Sources/shop/ShopAdmin.php on line 453