@piotr.gawron and @jacek.lebioda as predicted, I have issues even upgrading just to Django 2.1.
I copy here the message from the commit 9be3713e:
fixed issue with view logout
WIP: After the update, is failing to validate forms with boolean fields. If the boolean fields are not present, like postponed field on the test test_validation of web.tests.forms.test_StudySubjectEditForm.StudySubjectEditFormTests.
not sure how to proceed with the changes, apparently this should have raised issues before, because the docs indicate the following: https://docs.djangoproject.com/en/2.1/ref/forms/fields/#booleanfield
test_validation (web.tests.forms.test_StudySubjectEditForm.StudySubjectEditFormTests) ...
- postponed
- This field is required.
Closes #350 (closed)