fix #4036

gui/qt/qrtextedit.py

@@ -46,8 +46,12 @@ class ScanQRTextEdit(ButtonsTextEdit, MessageBoxMixin):
         fileName, __ = QFileDialog.getOpenFileName(self, 'select file')
         if not fileName:
             return
+        try:
             with open(fileName, "r") as f:
                 data = f.read()
+        except BaseException as e:
+            self.show_error(_('Error opening file') + ':\n' + str(e))
+        else:
             self.setText(data)
 
     def qr_input(self):