--- a/eric6/WebBrowser/Network/EricSchemeHandler.py Mon Mar 01 17:48:43 2021 +0100 +++ b/eric6/WebBrowser/Network/EricSchemeHandler.py Tue Mar 02 17:17:09 2021 +0100 @@ -112,8 +112,8 @@ contents = self.__errorPage() self.__buffer.setData(contents.encode("utf-8")) - self.__buffer.open(QIODevice.ReadOnly) - self.open(QIODevice.ReadOnly) + self.__buffer.open(QIODevice.OpenModeFlag.ReadOnly) + self.open(QIODevice.OpenModeFlag.ReadOnly) self.readyRead.emit()