Tested in a 16.0 environment, the problem still occurs.
Disable "Required Category" in helpdesk settings
Create a ticket by /new/ticket with empty category
Get
File "/mnt/data/odoo-addons-dir/helpdesk_mgmt/controllers/main.py", line 73, in _prepare_submit_ticket_vals
int(kw.get("category"))
ValueError: invalid literal for int() with base 10: ''
Same fix as #610
Tested in a 16.0 environment, the problem still occurs.
Disable "Required Category" in helpdesk settings
Create a ticket by /new/ticket with empty category
Get
File "/mnt/data/odoo-addons-dir/helpdesk_mgmt/controllers/main.py", line 73, in _prepare_submit_ticket_vals int(kw.get("category")) ValueError: invalid literal for int() with base 10: ''