When performing different actions in the tryton modules, the following novelty is generated

Support System Administrator
1 
Traceback (most recent call last):
  File "/usr/local/lib/python37/dist-packages/trytond/wsgipy", line 117, in dispatch_request
    return endpoint(request, **requestview_args)
  File "/usr/local/lib/python37/dist-packages/trytond/protocols/dispatcherpy", line 47, in rpc
    request, database_name, *requestrpc_params)
  File "/usr/local/lib/python37/dist-packages/trytond/protocols/wrapperspy", line 159, in wrapper
    return func(request, pool, *args, **kwargs)
  File "/usr/local/lib/python37/dist-packages/trytond/protocols/dispatcherpy", line 180, in _dispatch
    result = rpcresult(meth(*c_args, **c_kwargs))
  File "/usr/local/lib/python37/dist-packages/trytond/wizard/wizardpy", line 274, in create
    return (Sessioncreate([{}])[0]id, clsstart_state, clsend_state)
  File "/usr/local/lib/python37/dist-packages/trytond/res/userpy", line 519, in get_preferences
    preferences = cls_get_preferences(user, context_only=context_only)
  File "/usr/local/lib/python37/dist-packages/trytond/modules/stock/respy", line 23, in _get_preferences
    preferences = super()_get_preferences(user, context_only=context_only)
  File "/usr/local/lib/python37/dist-packages/trytond/modules/company_work_time/respy", line 12, in _get_preferences
    context_only=context_only)
  File "/usr/local/lib/python37/dist-packages/trytond/modules/company/respy", line 140, in _get_preferences
    context_only=context_only)
  File "/usr/local/lib/python37/dist-packages/trytond/res/userpy", line 481, in _get_preferences
    getattr(user, field)rec_name
  File "/usr/local/lib/python37/dist-packages/trytond/model/modelstoragepy", line 1595, in _getattr_
    self_transactiondatabaseIN_MAX)
AttributeError: 'NoneType' object has no attribute 'IN_MAX'
2

It seems your request is not for a database.
But also it seems your version is old, which one is it?

3

Hi, the current version we use is 6.0.

4

It seems that at least trytond is no up to date. Try first to update to last version of the series.

5

Also could you provide the log of the failing request on the server ?