IMPORTANT: It’s not connected with the plugin! It’s WooCommerce Rest API problem.
To solve this you need to:
- Go to Admin Panel
- Settings -> Permalinks
- Change “Common Settings” from Plain to Post Name (or any else, but not default Plain)
Alternative:
If you already using your website, or don’t want to change permalinks, you need to contact with your Hosting Provider and ask to set
AllowOverride All
For Apache:
<Directory /var/www/wordpress/>
Options Indexes FollowSymLinks MultiViews
AllowOverride All
Order allow,deny
allow from all
</Directory>
Note: Default Plain permalinks is not a good practice!