fix error not showing as new row has no focusedCellID

packages/frontend-core/src/components/grid/stores/rows.js

@@ -206,7 +206,14 @@ export const deriveStores = context => {
       focusedCellId.set(`${rowId}-${keys[0]}`)
     } else {
       // Some other error - just update the current cell
-      validation.actions.setError(get(focusedCellId), error?.message || "Error")
+      if (get(focusedCellId)) {
+        validation.actions.setError(
+          get(focusedCellId),
+          error?.message || "Error"
+        )
+      } else {
+        notifications.error(error?.message || "Error")
+      }
     }
   }