I just bought the module and it shows the following error
your help please
Odoo Server Error

Traceback (most recent call last):
  File "/opt/odoo/12.0/odoo/odoo/http.py", line 656, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/opt/odoo/12.0/odoo/odoo/http.py", line 314, in _handle_exception
    raise pycompat.reraise(type(exception), exception, sys.exc_info()[2])
  File "/opt/odoo/12.0/odoo/odoo/tools/pycompat.py", line 87, in reraise
    raise value
  File "/opt/odoo/12.0/odoo/odoo/http.py", line 698, in dispatch
    result = self._call_function(**self.params)
  File "/opt/odoo/12.0/odoo/odoo/http.py", line 346, in _call_function
    return checked_call(self.db, *args, **kwargs)
  File "/opt/odoo/12.0/odoo/odoo/service/model.py", line 98, in wrapper
    return f(dbname, *args, **kwargs)
  File "/opt/odoo/12.0/odoo/odoo/http.py", line 339, in checked_call
    result = self.endpoint(*a, **kw)
  File "/opt/odoo/12.0/odoo/odoo/http.py", line 941, in __call__
    return self.method(*args, **kw)
  File "/opt/odoo/12.0/odoo/odoo/http.py", line 519, in response_wrap
    response = f(*args, **kw)
  File "/opt/odoo/12.0/odoo/addons/web/controllers/main.py", line 967, in call_button
    action = self._call_kw(model, method, args, {})
  File "/opt/odoo/12.0/odoo/addons/web/controllers/main.py", line 955, in _call_kw
    return call_kw(request.env[model], method, args, kwargs)
  File "/opt/odoo/12.0/odoo/odoo/api.py", line 759, in call_kw
    return _call_kw_multi(method, model, args, kwargs)
  File "/opt/odoo/12.0/odoo/odoo/api.py", line 746, in _call_kw_multi
    result = method(recs, *args, **kwargs)
  File "/opt/odoo/extra-addons/pos_z_reports/models/pos.py", line 34, in generate_detail_z_order_report
    data.update(self.env['report.pos_z_reports.report_saledetails22'].get_sale_details1(self.ids[0]))
  File "/opt/odoo/extra-addons/pos_z_reports/models/pos.py", line 184, in get_sale_details1
    local = pytz.timezone(user_tz)
  File "/usr/local/lib/python3.7/dist-packages/pytz/__init__.py", line 163, in timezone
    try:
AttributeError: 'UTC' object has no attribute 'upper'

I want to know if it is compatible with the community version of odoo 12 and if in the report it displays my earnings, that is to say the public price-cost price of the sales made at the close of the session. Thanks for your information