Migrating a 12.0 to 14.0 I found an error in this file in the base module:
https://github.com/OCA/OCB/blob/14.0/odoo/addons/base/data/ir_module_module.xml#L289C49-L289C80
Where is defined the category_id with ref base.module_category_website_website which does not exist.
It's defined in the module website instead: https://github.com/odoo/odoo/blob/14.0/addons/website/security/website_security.xml#L3
Maybe they intended to use module_category_website here: https://github.com/odoo/odoo/blob/14.0/odoo/addons/base/data/ir_module_category_data.xml#L64
Versions with the problem: