First error:

Traceback (most recent call last):
  File "/home/eints/eints/webtranslate/bottle.py", line 764, in _handle
    return route.call(**args)
  File "/home/eints/eints/webtranslate/bottle.py", line 1600, in wrapper
    rv = callback(*a, **ka)
  File "/home/eints/eints/webtranslate/protect.py", line 33, in wrapper
    userauth = users.get_authentication(user, pwd)
  File "/home/eints/eints/webtranslate/users/redmine.py", line 124, in get_authentication
    cur.execute("SELECT users.hashed_password, users.salt FROM users WHERE users.login=%s", (user,))
psycopg2.OperationalError: terminating connection due to administrator command
FATAL:  terminating connection due to administrator command



Every next attempt:

Traceback (most recent call last):
  File "/home/eints/eints/webtranslate/bottle.py", line 764, in _handle
    return route.call(**args)
  File "/home/eints/eints/webtranslate/bottle.py", line 1600, in wrapper
    rv = callback(*a, **ka)
  File "/home/eints/eints/webtranslate/protect.py", line 33, in wrapper
    userauth = users.get_authentication(user, pwd)
  File "/home/eints/eints/webtranslate/users/redmine.py", line 123, in get_authentication
    cur = db_connection.cursor()
psycopg2.InterfaceError: connection already closed