Current next-gen lister cran failing to list

lister-cran status: run ko [1]

swhworker@worker0:~$ SWH_CONFIG_FILENAME=/etc/softwareheritage/lister.yml swh lister run --lister cran
Traceback (most recent call last):
  File "/usr/bin/swh", line 11, in <module>
    load_entry_point('swh.core==0.11.0', 'console_scripts', 'swh')()
...
  File "/usr/lib/python3/dist-packages/swh/core/api/__init__.py", line 344, in raise_for_status
    raise exception from None
swh.core.api.RemoteException: <RemoteException 500 TypeError: ["can not serialize 'Attribute' object"]>

• [1] https://sentry.softwareheritage.org/share/issue/2cd53c7575834b1aaf65760b80bcbcef/

Related to swh/infra/sysadm-environment#2998 (closed)

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Migrated from T3002 (view on Phabricator)