[trebZ3]

Getting error installing plugin Calibre 4.23 :

Traceback (most recent call last):
File "site-packages\calibre\gui2\dialogs\plugin_updater.py", line 725, in _install_clicked
File "site-packages\calibre\customize\ui.py", line 472, in add_plugin
File "site-packages\calibre\customize\ui.py", line 61, in load_plugin
File "site-packages\calibre\customize\zipplugin.py", line 203, in load
File "importlib\__init__.py", line 37, in import_module
File "site-packages\calibre\customize\zipplugin.py", line 181, in load_module
File "calibre_plugins.dummy2.__init__", line 141
def get_book_url(self, identifiers) -> Optional[Tuple]:
^
SyntaxError: invalid syntax

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The Carat symbol in Calibre is pointing at the comma not what it shows in the above quote.