No weather because of an error in the timezone module (I think)

Picroft, RPI4, Google Voice HAT.

If I ask the weather, I get the message MyCroft can’t currently reach the weather report.

In the terminal (with SSH) I can see:

~~~~ERROR    |   737 | mycroft.skills.event_scheduler:on_error:331 | An error occured executing the scheduled event AttributeError("module 'pytz' has no attribute 'all_timezones'")
Traceback (most recent call last):
  File "/home/pi/mycroft-core/mycroft/skills/mycroft_skill/", line 109, in wrapper
  File "/opt/mycroft/skills/mycroft-date-time.mycroftai/", line 349, in update_display
    self.gui['time_string'] = self.get_display_current_time()
  File "/opt/mycroft/skills/mycroft-date-time.mycroftai/", line 243, in get_display_current_time
    dt = self.get_local_datetime(location, dtUTC)
  File "/opt/mycroft/skills/mycroft-date-time.mycroftai/", line 223, in get_local_datetime
    tz = self.get_timezone(self.location_timezone)
  File "/opt/mycroft/skills/mycroft-date-time.mycroftai/", line 209, in get_timezone
    timezone = self._get_timezone_from_fuzzymatch(locale)
  File "/opt/mycroft/skills/mycroft-date-time.mycroftai/", line 166, in _get_timezone_from_fuzzymatch
    for name in pytz.all_timezones:
AttributeError: module 'pytz' has no attribute 'all_timezones'

Which is repeated several times. When I ask the location, MyCroft correctly tells me Brussels, Belgium.

How can I fix this?

This is not the weather skill. This should be skill-date-time responding to something like “give me the time”.

The attribute all_timezones is ancient, so… i wonder what the version is like pip freeze | grep pytz. But if the picroft image isn’t an archeological discovery, …