[2019-11-12 09:28:53,946: ERROR/MainProcess] Task web_edu.plugins.reports.constructor.tasks.BuildReportTask[fb77ac84-7dc8-4957-a374-49ebab2a2eca] raised unexpected: TypeError("Unsupported type <class 'web_edu.core.school_event.models.SchoolEventType'> in write()",)
Traceback (most recent call last):
  File "/var/www/.virtualenvs/web_edu_contingent/lib/python2.7/site-packages/celery/app/trace.py", line 218, in trace_task
    R = retval = fun(*args, **kwargs)
  File "/var/www/.virtualenvs/web_edu_contingent/lib/python2.7/site-packages/celery/app/trace.py", line 398, in __protected_call__
    return self.run(*args, **kwargs)
  File "/var/www/edu/web_edu_contingent/web_edu/plugins/reports/constructor/tasks.py", line 29, in run
    result = self.make_report(*args, **kwargs)
  File "/var/www/.virtualenvs/web_edu_contingent/lib/python2.7/site-packages/educommon/report/constructor/mixins.py", line 61, in make_report
    builder.build()
  File "/var/www/.virtualenvs/web_edu_contingent/lib/python2.7/site-packages/educommon/report/constructor/builders/excel/_base.py", line 1162, in build
    self._flush_data()
  File "/var/www/.virtualenvs/web_edu_contingent/lib/python2.7/site-packages/educommon/report/constructor/builders/excel/with_merged_cells.py", line 164, in _flush_data
    data_frame.write(self._data)
  File "/var/www/.virtualenvs/web_edu_contingent/lib/python2.7/site-packages/educommon/report/constructor/builders/excel/with_merged_cells.py", line 137, in write
    self._write_block(data)
  File "/var/www/.virtualenvs/web_edu_contingent/lib/python2.7/site-packages/educommon/report/constructor/builders/excel/with_merged_cells.py", line 79, in _write_block
    block_frame.write(row_data)
  File "/var/www/.virtualenvs/web_edu_contingent/lib/python2.7/site-packages/educommon/report/constructor/builders/excel/with_merged_cells.py", line 139, in write
    self._write_row(data)
  File "/var/www/.virtualenvs/web_edu_contingent/lib/python2.7/site-packages/educommon/report/constructor/builders/excel/with_merged_cells.py", line 131, in _write_row
    self._write_block(cell_data, row_height)
  File "/var/www/.virtualenvs/web_edu_contingent/lib/python2.7/site-packages/educommon/report/constructor/builders/excel/with_merged_cells.py", line 79, in _write_block
    block_frame.write(row_data)
  File "/var/www/.virtualenvs/web_edu_contingent/lib/python2.7/site-packages/educommon/report/constructor/builders/excel/with_merged_cells.py", line 139, in write
    self._write_row(data)
  File "/var/www/.virtualenvs/web_edu_contingent/lib/python2.7/site-packages/educommon/report/constructor/builders/excel/with_merged_cells.py", line 133, in _write_row
    self._write_cell(cell_data, row_height)
  File "/var/www/.virtualenvs/web_edu_contingent/lib/python2.7/site-packages/educommon/report/constructor/builders/excel/with_merged_cells.py", line 68, in _write_cell
    top, left, cell_data, style,
  File "/var/www/.virtualenvs/web_edu_contingent/lib/python2.7/site-packages/xlsxwriter/worksheet.py", line 65, in cell_wrapper
    return method(self, *args, **kwargs)
  File "/var/www/.virtualenvs/web_edu_contingent/lib/python2.7/site-packages/xlsxwriter/worksheet.py", line 433, in write
    raise TypeError("Unsupported type %s in write()" % type(token))
TypeError: Unsupported type <class 'web_edu.core.school_event.models.SchoolEventType'> in write()