Hi everybody, 
because reasons (TL;DR: managed lab with ancient software installed) I need to run an older version of otree in one server.

I'm getting the Django error attached (apologies, apparently I cannot copy-paste in the sh***y web-based terminal emulator I got access to...)

I suspect it has something to do with the old versions of some of the dependencies I'm forced to use.
Here is the list:

(.env) -bash-4.2$ python3 -m pip list
Package               Version
--------------------- ---------
asgi-redis            0.14.1
asgiref               0.14.0
autobahn              0.16.0
certifi               2025.4.26
channels              0.17.3
colorama              0.3.7
contextlib2           0.5.4
daphne                0.14.3
dj-database-url       0.4.1
Django                1.11.2
django-idmap          1.0.3
django-vanilla-views  1.0.4
honcho                0.7.1
huey                  1.10.2
IPy                   0.83
msgpack-python        0.4.8
otree                 2.2.4
otree-boto2-shim      0.3.2
otree-core            0.0.0b1
otree-save-the-change 1.1.3
pbr                   1.10.0
pip                   21.3.1
psycopg-binary        3.0.18
py                    1.4.31
pytest                2.9.2
pytest-django         3.0.0
python-redis-lock     3.7.0
pytz                  2017.3
redis                 2.10.5
requests              2.11.1
schema                0.6.2
sentry-sdk            0.7.9
setuptools            39.2.0
six                   1.10.0
termcolor             1.1.0
Twisted               16.2.0
txaio                 2.5.1
unicodecsv            0.14.1
urllib3               1.26.20
wheel                 0.29.0
whitenoise            3.2.1
ws4py                 0.3.5
XlsxWriter            0.9.3
zope.interface        4.2.0

Has somebody got any idea about the actual specific issue?