UnicodeEncodeError while issue status is set resolved

[xuhaida]

Hi all! I'm using Poi to manage my projects. Today when an issue status is set resolved, some errors occurs. I see the UnicodeEncodeError exception followed:

Traceback (innermost last):
Module ZPublisher.Publish, line 138, in publish
Module ZPublisher.mapply, line 77, in mapply
Module ZPublisher.Publish, line 48, in call_object
Module Products.Poi.browser.response, line 410, in call
Module Products.CMFCore.WorkflowTool, line 241, in doActionFor
Module Products.CMFCore.WorkflowTool, line 552, in _invokeWithNotification
Module Products.DCWorkflow.DCWorkflow, line 282, in doActionFor
Module Products.DCWorkflow.DCWorkflow, line 421, in _changeStateOf
Module Products.DCWorkflow.DCWorkflow, line 531, in _executeTransition
Module zope.event, line 31, in notify
Module zope.component.event, line 24, in dispatch
Module zope.component._api, line 136, in subscribers
Module zope.component.registry, line 321, in subscribers
Module zope.interface.adapter, line 585, in subscribers
Module zope.component.event, line 32, in objectEventNotify
Module zope.component._api, line 136, in subscribers
Module zope.component.registry, line 321, in subscribers
Module zope.interface.adapter, line 585, in subscribers
Module Products.Poi.events, line 139, in mail_issue_change
Module collective.watcherlist.watchers, line 249, in send
Module collective.watcherlist.mailer, line 42, in simple_send_mail
UnicodeEncodeError: 'ascii' codec can't encode characters in position 5-8: ordinal not in range(128)

Is some configuration wrong in the watcherlist ?

My environment:
virtualbox: 5.1.2 by vagrant
ubuntu: 16.04
Plone: 5.0.8-r2
Products.Poi 4.0.
language: Chinese

[tkimnguyen]

Usually these errors are caused by strange characters in string or text fields, particularly if copied and pasted from Word

[xuhaida]

Something is very strange while I use ./plonectl fg. Exception is ok! I don't know why!