With which module do you encounter problems?

ing

Describe the problem you encounter

I am using several instances of the ing backend, as I retrieve the accounts of my wife and mother in law in addition to mine - yes I should get a reward for this ;-b

Doing so, I get the following error when doing the list command in boobank:

Bug(ingBruno): type object 'BourseDirectBrowser' has no attribute 'PARENT_ATTR'

Paste here the stacktrace or error message you observe

Bug(ingBruno): type object 'BourseDirectBrowser' has no attribute 'PARENT_ATTR'
Traceback (most recent call last):
  File "C:\Users\Bruno\AppData\Roaming\Python\Python38\site-packages\weboob-2.1-py3.8.egg\weboob\core\bcall.py", line 106, in backend_process
    for subresult in result:
  File "C:\Users\Bruno\AppData\Roaming\Python\Python38\site-packages\weboob-2.1-py3.8.egg\weboob\tools\application\base.py", line 297, in _do_complete_iter
    for i, sub in enumerate(res):
  File "d:/Dropbox/Projets/boomoney/modules/ing\module.py", line 79, in iter_accounts
    for account in self.browser.iter_accounts():
  File "C:\Users\Bruno\AppData\Roaming\Python\Python38\site-packages\weboob-2.1-py3.8.egg\weboob\tools\backend.py", line 343, in browser
    self._browser = self.create_default_browser()
  File "d:/Dropbox/Projets/boomoney/modules/ing\module.py", line 61, in create_default_browser
    return self.create_browser(
  File "C:\Users\Bruno\AppData\Roaming\Python\Python38\site-packages\weboob-2.1-py3.8.egg\weboob\tools\backend.py", line 383, in create_browser
    browser = klass(*args, **kwargs)
  File "d:/Dropbox/Projets/boomoney/modules/ing\api_browser.py", line 130, in __init__
    self.bourse = BourseDirectBrowser(None, None, **kwargs)
  File "C:\Users\Bruno\AppData\Roaming\Python\Python38\site-packages\weboob-2.1-py3.8.egg\weboob\browser\browsers.py", line 1188, in __new__
    cls._resolve_abstract(weboob)
  File "C:\Users\Bruno\AppData\Roaming\Python\Python38\site-packages\weboob-2.1-py3.8.egg\weboob\browser\browsers.py", line 1171, in _resolve_abstract
    if cls.PARENT_ATTR is None:
AttributeError: type object 'BourseDirectBrowser' has no attribute 'PARENT_ATTR'

What are the steps to reproduce the problem?

Use several times the ing backend, as in:

[ingBruno]
_module = ing
birthday = XXXXX
login = XXXXX
password = XXXXX

[ingWife]
_module = ing
birthday = XXXXX
login = XXXXX
password = XXXXX

[ingMotherInlaw]
_module = ing
birthday = XXXXX
login = XXXXX
password = XXXXX

What weboob version are you using?

Output of weboob-config --version command:

weboob-config v2.1 Copyright(C) 2010-2020 Christophe Benz, Romain Bignon

What module version are you using?

Output of weboob-config info MODULE_NAME command:

.------------------------------------------------------------------------------.
| Module ing                                                                   |
+-----------------.------------------------------------------------------------'
| Version         | 202011212314
| Maintainer      | Florent Fourcot <weboob@flo.fourcot.fr>
| License         | LGPLv3+
| Description     | ING France
| Capabilities    | CapDocument, CapProfile, CapBankTransferAddRecipient, CapBankTransfer, CapBankWealth, CapBank, CapCollection, CapTransfer
| Installed       | yes
| Location        | d:/Dropbox/Projets/boomoney/modules/ing
|                 |
| Configuration   | login: Numéro client (default: )
|                 | password: Code secret (default: )
|                 | birthday: Date de naissance
'-----------------'

How did you install weboob?

Windows manual installation with git clone

Additional info you'd like to mention