diff --git a/src/core/components/DataTable.jsx b/src/core/components/DataTable.jsx
index 1ec20b4..b41f19f 100644
--- a/src/core/components/DataTable.jsx
+++ b/src/core/components/DataTable.jsx
@@ -105,7 +105,8 @@ function DataTable(props) {
         positionToolbarAlertBanner="bottom"
         renderTopToolbarCustomActions={({table}) => (<>
             {props.enableCustomToolbar /* send condition */ ?
-                <props.CustomToolbar fetchUrl={fetchUrl} mutate={mutate}/> /* send component */ : ""}
+                <props.CustomToolbar fetchUrl={fetchUrl}
+                                     mutate={mutate}/> /* send component */ : <span></span>}
         </>)}
         renderBottomToolbarCustomActions={({table}) => (<>
             {props.enableLastUpdate /* send condition */ ? (<Typography