charts: edit connection causes page crash

What is the bug?

When I click on edit connection, I get the following exception:

Something bad has happened.
Please consider letting us know by creating a bug report using GitHub.

Python version: 3.8.10
Airflow version: 2.1.2
Node: airflow-new-web-6784f5c49c-98gg5
-------------------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/airflow/.local/lib/python3.8/site-packages/flask/app.py", line 2447, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/airflow/.local/lib/python3.8/site-packages/flask/app.py", line 1952, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/home/airflow/.local/lib/python3.8/site-packages/flask/app.py", line 1821, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/home/airflow/.local/lib/python3.8/site-packages/flask/_compat.py", line 39, in reraise
    raise value
  File "/home/airflow/.local/lib/python3.8/site-packages/flask/app.py", line 1950, in full_dispatch_request
    rv = self.dispatch_request()
  File "/home/airflow/.local/lib/python3.8/site-packages/flask/app.py", line 1936, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/airflow/.local/lib/python3.8/site-packages/flask_appbuilder/security/decorators.py", line 109, in wraps
    return f(self, *args, **kwargs)
  File "/home/airflow/.local/lib/python3.8/site-packages/flask_appbuilder/views.py", line 602, in edit
    widgets = self._edit(pk)
  File "/home/airflow/.local/lib/python3.8/site-packages/flask_appbuilder/baseviews.py", line 1233, in _edit
    form = self.edit_form.refresh(obj=item)
  File "/home/airflow/.local/lib/python3.8/site-packages/flask_appbuilder/forms.py", line 329, in refresh
    form = self(obj=obj)
  File "/home/airflow/.local/lib/python3.8/site-packages/wtforms/form.py", line 208, in __call__
    return type.__call__(cls, *args, **kwargs)
  File "/home/airflow/.local/lib/python3.8/site-packages/flask_wtf/form.py", line 87, in __init__
    super(FlaskForm, self).__init__(formdata=formdata, **kwargs)
  File "/home/airflow/.local/lib/python3.8/site-packages/wtforms/form.py", line 274, in __init__
    self.process(formdata, obj, data=data, **kwargs)
  File "/home/airflow/.local/lib/python3.8/site-packages/wtforms/form.py", line 126, in process
    if obj is not None and hasattr(obj, name):
  File "/home/airflow/.local/lib/python3.8/site-packages/sqlalchemy/orm/attributes.py", line 365, in __get__
    retval = self.descriptor.__get__(instance, owner)
  File "/home/airflow/.local/lib/python3.8/site-packages/airflow/models/connection.py", line 262, in get_extra
    return fernet.decrypt(bytes(self._extra, 'utf-8')).decode()
  File "/home/airflow/.local/lib/python3.8/site-packages/cryptography/fernet.py", line 194, in decrypt
    raise InvalidToken
cryptography.fernet.InvalidToken

What version of the chart are you using?:

I am using version 8.5.2

What is your Kubernetes Version?:

$ kubectl version
Client Version: version.Info{Major:"1", Minor:"21", GitVersion:"v1.21.2", GitCommit:"092fbfbf53427de67cac1e9fa54aaa09a28371d7", GitTreeState:"clean", BuildDate:"2021-06-16T12:59:11Z", GoVersion:"go1.16.5", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"19+", GitVersion:"v1.19.13-eks-8df270", GitCommit:"8df2700a72a2598fa3a67c05126fa158fd839620", GitTreeState:"clean", BuildDate:"2021-07-31T01:36:57Z", GoVersion:"go1.15.14", Compiler:"gc", Platform:"linux/amd64"}

What is your Helm version?:

$ helm version
version.BuildInfo{Version:"v3.5.4", GitCommit:"1b5edb69df3d3a08df77c9902dc17af864ff05d1", GitTreeState:"dirty", GoVersion:"go1.16.3"}

Please copy your custom Helm values file:

airflow:
  config:
    AIRFLOW__CORE__DAGS_ARE_PAUSED_AT_CREATION: True
    AIRFLOW__CORE__SQL_ALCHEMY_POOL_SIZE: 1000
    AIRFLOW__CELERY__CELERY_CONCURRENCY: 16
    AIRFLOW__CELERY__WORKER_CONCURRENCY: 16
    AIRFLOW__SMTP__SMTP_HOST: mail-relay.some-domain.company.com
    AIRFLOW__SMTP__SMTP_STARTTLS: False
    AIRFLOW__SMTP__SMTP_MAIL_FROM: new-airflow-dev@company.com
    AIRFLOW__SMTP__SMTP_PORT: 1465
    AIRFLOW__SCHEDULER__CATCHUP_BY_DEFAULT: False
    AIRFLOW__SCHEDULER__RUN_DURATION: 21600
    AIRFLOW__WEBSERVER__BASE_URL: http://new-airflow.team-dev.company.com:8080/
    AIRFLOW__SCHEDULER__DAG_DIR_LIST_INTERVAL: 60
    PIP_INDEX_URL: https://some-nexus-url/repository/company-pypi-group/simple
  extraEnv:
    - name: AIRFLOW__CORE__FERNET_KEY
      valueFrom:
        secretKeyRef:
          name: secret-envvars
          key: fernet-key
  variables:
    - key: "environment"
      value: "dev"
    - key: "foo.alert_emails"
      value: "['something@company.com']"
  connections:
    - id: databricks_default
      type: databricks
      token: 123
      host: company.cloud.databricks.com
      extra: '{"host": "company.cloud.databricks.com", "token":"123"}'  
web:
  initialDelaySeconds: 30
  service:
    type: LoadBalancer
    annotations:
      external-dns.alpha.kubernetes.io/hostname: new-airflow.team-dev.company.com
      service.beta.kubernetes.io/aws-load-balancer-internal: 0.0.0.0/0
      service.beta.kubernetes.io/aws-load-balancer-type: nlb  
dags:
  gitSync:
    repo: https://oauth2:123@gitlab.some-domain.company.com/company/team-airflow.git
    branch: dev
    enabled: true
    syncWait: 60
persistence:
  enabled: true
  storageClass: gp2
  size: 10Gi
workers:
  replicas: 2
postgresql:
  postgresqlExtendedConf:
    maxConnections: "1000"