"Session Start Failed" modal dialog "Kanban Board"

I am trying to migrate from 7.2 to 8.4 and almost succeeded. The main site for non-logged-in users is working. But the problem is that now when I login I got a modal dialog error:
“Session Start Failed” - title
“Kanban Board” - text
and a “Close” button.

Even if I close the message I cannot continue to ERPNext Desk.

Any ideas how to disable Kanban for my user ? (I don’t use it)
Or idea how to add user rights for Kanban for my user in order to pass this check/error? Though I don’t have any Kanban boards in the system.

/opt/bitnami/apache2/logs$ tail -n 100 error_log
… gives the following error …

[Sun Jul 30 03:37:59.289268 2017] [:error] [pid 1550] Traceback (most recent call last):
[Sun Jul 30 03:37:59.289313 2017] [:error] [pid 1550] File “/opt/bitnami/apps/erpnext/htdocs/frappe-bench/apps/frappe/frappe/www/desk.py”, line 22, in get
_context
[Sun Jul 30 03:37:59.289317 2017] [:error] [pid 1550] boot = frappe.sessions.get()
[Sun Jul 30 03:37:59.289320 2017] [:error] [pid 1550] File “/opt/bitnami/apps/erpnext/htdocs/frappe-bench/apps/frappe/frappe/sessions.py”, line 150, in ge
t
[Sun Jul 30 03:37:59.289323 2017] [:error] [pid 1550] bootinfo = get_bootinfo()
[Sun Jul 30 03:37:59.289326 2017] [:error] [pid 1550] File “/opt/bitnami/apps/erpnext/htdocs/frappe-bench/apps/frappe/frappe/boot.py”, line 55, in get_boo
tinfo
[Sun Jul 30 03:37:59.289329 2017] [:error] [pid 1550] doclist.extend(get_meta_bundle(“Page”))
[Sun Jul 30 03:37:59.289331 2017] [:error] [pid 1550] File “/opt/bitnami/apps/erpnext/htdocs/frappe-bench/apps/frappe/frappe/desk/form/load.py”, line 82,
in get_meta_bundle
[Sun Jul 30 03:37:59.289334 2017] [:error] [pid 1550] bundle = [frappe.desk.form.meta.get_meta(doctype)]
[Sun Jul 30 03:37:59.289337 2017] [:error] [pid 1550] File “/opt/bitnami/apps/erpnext/htdocs/frappe-bench/apps/frappe/frappe/desk/form/meta.py”, line 22,
in get_meta
[Sun Jul 30 03:37:59.289341 2017] [:error] [pid 1550] meta = frappe.cache().hget(“form_meta”, doctype, lambda: FormMeta(doctype))
[Sun Jul 30 03:37:59.289343 2017] [:error] [pid 1550] File “/opt/bitnami/apps/erpnext/htdocs/frappe-bench/apps/frappe/frappe/utils/redis_wrapper.py”, line
173, in hget
[Sun Jul 30 03:37:59.289347 2017] [:error] [pid 1550] value = generator()
[Sun Jul 30 03:37:59.289349 2017] [:error] [pid 1550] File “/opt/bitnami/apps/erpnext/htdocs/frappe-bench/apps/frappe/frappe/desk/form/meta.py”, line 22,
in
[Sun Jul 30 03:37:59.289353 2017] [:error] [pid 1550] meta = frappe.cache().hget(“form_meta”, doctype, lambda: FormMeta(doctype))
[Sun Jul 30 03:37:59.289356 2017] [:error] [pid 1550] File “/opt/bitnami/apps/erpnext/htdocs/frappe-bench/apps/frappe/frappe/desk/form/meta.py”, line 34,
in init
[Sun Jul 30 03:37:59.289358 2017] [:error] [pid 1550] self.load_assets()
[Sun Jul 30 03:37:59.289361 2017] [:error] [pid 1550] File “/opt/bitnami/apps/erpnext/htdocs/frappe-bench/apps/frappe/frappe/desk/form/meta.py”, line 46,
in load_assets
[Sun Jul 30 03:37:59.289364 2017] [:error] [pid 1550] self.load_kanban_meta()
[Sun Jul 30 03:37:59.289378 2017] [:error] [pid 1550] File “/opt/bitnami/apps/erpnext/htdocs/frappe-bench/apps/frappe/frappe/desk/form/meta.py”, line 182,
in load_kanban_meta
[Sun Jul 30 03:37:59.289381 2017] [:error] [pid 1550] self.load_kanban_boards()
[Sun Jul 30 03:37:59.289383 2017] [:error] [pid 1550] File “/opt/bitnami/apps/erpnext/htdocs/frappe-bench/apps/frappe/frappe/desk/form/meta.py”, line 187,
in load_kanban_boards
[Sun Jul 30 03:37:59.289386 2017] [:error] [pid 1550] ‘Kanban Board’, fields=[‘name’, ‘filters’, ‘reference_doctype’, ‘private’], filters={‘reference_do
ctype’: self.name})
[Sun Jul 30 03:37:59.289389 2017] [:error] [pid 1550] File “/opt/bitnami/apps/erpnext/htdocs/frappe-bench/apps/frappe/frappe/init.py”, line 1127, in g
et_list
[Sun Jul 30 03:37:59.289392 2017] [:error] [pid 1550] return frappe.model.db_query.DatabaseQuery(doctype).execute(None, *args, **kwargs)
[Sun Jul 30 03:37:59.289395 2017] [:error] [pid 1550] File “/opt/bitnami/apps/erpnext/htdocs/frappe-bench/apps/frappe/frappe/model/db_query.py”, line 40,
in execute
[Sun Jul 30 03:37:59.289398 2017] [:error] [pid 1550] raise frappe.PermissionError, self.doctype
[Sun Jul 30 03:37:59.289400 2017] [:error] [pid 1550] PermissionError: Kanban Board
[Sun Jul 30 03:37:59.289404 2017] [:error] [pid 1550]