Traceback (most recent call last):
  File "/usr/local/lib/python35/dist-packages/trytond/wsgipy", line 70, in dispatch_request
    selfcheck_request_size(request, max_request_size)
  File "/usr/local/lib/python35/dist-packages/trytond/wsgipy", line 50, in check_request_size
    if requestuser_id:
  File "/werkzeug/utilspy", line 73, in __get__
    value = selffunc(obj)
  File "/usr/local/lib/python35/dist-packages/trytond/protocols/wrapperspy", line 66, in user_id
    context={'_request': selfcontext})
  File "/usr/local/lib/python35/dist-packages/trytond/securitypy", line 70, in check
    with Transaction()start(dbname, user, context=context) as transaction:
  File "/usr/local/lib/python35/dist-packages/trytond/transactionpy", line 94, in start
    autocommit=autocommit)
  File "/usr/local/lib/python35/dist-packages/trytond/backend/postgresql/databasepy", line 129, in get_connection
    connset_isolation_level(ISOLATION_LEVEL_REPEATABLE_READ)
psycopg2OperationalError: server closed the connection unexpectedly
	This probably means the server terminated abnormally
	before or while processing the request