nikkylesssy-star opened a new issue, #63982:
URL: https://github.com/apache/airflow/issues/63982
### Apache Airflow version
3.1.8
### If "Other Airflow 3 version" selected, which one?
_No response_
### What happened?
Apache Airflow 3.1.8: Pages /users/list/ and /roles/list/ crash with:
TypeError: super(type, obj): obj must be an instance or subtype of type
Traceback points to: flask_appbuilder/fieldwidgets.py in BS3TextFieldWidget.
Occurs on Airflow Web UI when visiting Users and Roles screens.
(flask_appbuilder version bundled with 3.1.8?)
Database state:
– ab_user and ab_role tables contain valid records.
Expected behaviour:
UI displays list of users / roles without exception.
Relevant logs and traceback are attached below.
Please advise if this is a known issue or required patch?
Environment:
Airflow 3.1.8 (from Bitnami Helm)
Python 3.x
Flask AppBuilder integration.
### What you think should happen instead?
_No response_
### How to reproduce
Steps to reproduce:
1. Install Airflow 3.1.8 (Helm/Bitnami or other)
2. Log in as Admin
3. Navigate to /users/list/ or /roles/list/
4. See 500 error with TypeError
### Operating System
k8s
### Versions of Apache Airflow Providers
_No response_
### Deployment
Official Apache Airflow Helm Chart
### Deployment details
_No response_
### Anything else?
TypeError: super(type, obj): obj must be an instance or subtype of type
INFO: 172.22.48.113:59932 - "GET /auth/users/list/ HTTP/1.1" 500
Internal Server Error
INFO: 172.22.25.96:49750 - "GET
/ui/dags?dag_runs_limit=14&limit=50&offset=0&exclude_stale=true&order_by=dag_display_name
HTTP/1.1" 200 OK
INFO: 172.22.25.96:49750 - "GET
/api/v2/variables?limit=30&offset=0&order_by=key HTTP/1.1" 200 OK
2026-03-20T10:31:22.490021Z [error ] Exception on /roles/list/ [GET]
[airflow.providers.fab.www.app] loc=app.py:1744
Traceback (most recent call last):
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/flask/app.py", line
2529, in wsgi_app
response = self.full_dispatch_request()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/flask/app.py", line
1825, in full_dispatch_request
rv = self.handle_user_exception(e)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/flask/app.py", line
1823, in full_dispatch_request
rv = self.dispatch_request()
^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/flask/app.py", line
1799, in dispatch_request
return self.ensure_sync(self.view_functions[rule.endpoint])(**view_args)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/flask_appbuilder/security/decorators.py",
line 151, in wraps
return f(self, *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/flask_appbuilder/views.py",
line 205, in list
return self.render_template(
^^^^^^^^^^^^^^^^^^^^^
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/flask_appbuilder/baseviews.py",
line 346, in render_template
return render_template(
^^^^^^^^^^^^^^^^
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/flask/templating.py",
line 147, in render_template
return _render(app, template, context)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/flask/templating.py",
line 130, in _render
rv = template.render(context)
^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/jinja2/environment.py",
line 1295, in render
self.environment.handle_exception()
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/jinja2/environment.py",
line 942, in handle_exception
raise rewrite_traceback_stack(source=source)
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/flask_appbuilder/templates/appbuilder/general/model/list.html",
line 2, in top-level template code
{% import 'appbuilder/general/lib.html' as lib %}
^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/flask_appbuilder/templates/appbuilder/base.html",
line 1, in top-level template code
{% extends base_template %}
^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/airflow/providers/fab/www/templates/airflow/main.html",
line 21, in top-level template code
{% from 'airflow/_messages.html' import show_message %}
^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/flask_appbuilder/templates/appbuilder/baselayout.html",
line 2, in top-level template code
{% import 'appbuilder/baselib.html' as baselib %}
^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/flask_appbuilder/templates/appbuilder/init.html",
line 42, in top-level template code
{% block body %}
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/flask_appbuilder/templates/appbuilder/baselayout.html",
line 19, in block 'body'
{% block content %}
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/flask_appbuilder/templates/appbuilder/general/model/list.html",
line 7, in block 'content'
{% block list_search scoped %}
^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/flask_appbuilder/templates/appbuilder/general/model/list.html",
line 8, in block 'list_search'
{% call lib.accordion_tag("accordion1",_("Search"), False) %}
^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/jinja2/runtime.py",
line 784, in _invoke
rv = self._func(*arguments)
^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/flask_appbuilder/templates/appbuilder/general/lib.html",
line 304, in template
{{ caller() }}
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/jinja2/runtime.py",
line 784, in _invoke
rv = self._func(*arguments)
^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/flask_appbuilder/templates/appbuilder/general/model/list.html",
line 9, in template
{{ widgets.get('search')()|safe }}
^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/flask_appbuilder/widgets.py",
line 114, in __call__
form_fields[col] = self.template_args["form"][col]()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/wtforms/fields/core.py",
line 164, in __call__
return self.meta.render_field(self, kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/wtforms/meta.py", line
64, in render_field
return field.widget(field, **render_kw)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File
"/opt/bitnami/airflow/venv/lib/python3.12/site-packages/flask_appbuilder/fieldwidgets.py",
line 68, in __call__
return super(BS3TextFieldWidget, self).__call__(field, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: super(type, obj): obj must be an instance or subtype of type
INFO: 172.22.48.113:59932 - "GET /auth/roles/list/ HTTP/1.1" 500
Internal Server Error
### Are you willing to submit PR?
- [ ] Yes I am willing to submit a PR!
### Code of Conduct
- [x] I agree to follow this project's [Code of
Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)
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