Hi,

Sincerely apologize for the late reply.

Based on the error messages, it seems like you are not using the corresponding module with component.

You should use the module and component that you see at the download page here: Download links for both components and modules

By the way, the module makes use of the component. So please install just the component first. Make sure the component is working first. Then add the module. The module does not run without the component.

Regards,
/kksou

Thanks, both were installed.
In fact, I just did not know a MENU ITEM with the component had to be created first, I never used any module in this way, and this is never clear at any moment in the guidelines.
It does work now, however the upd and down arrow symbols do not show on the stock table (broken link to image symbol), even if the images are there in the correct folder.
This is the same on your demo site actually.