Buy now button on course list

Hello, I think I have set up everything correctly by following the documentation. I'm using the virtuemart plugin and the course is listed fine in virtuemart from what I can see.

In joomdle settings the action buttons are set as follows :

Show button for free courses : enrol into course
Show button for paid courses : buy course
Go to course button : moodle

I have set a price of £49.99 in virtuemart for the course yet no buttons are showing on the course list: www.midwiferynursingonline.co.uk/index.php/e-learning

Why aren't the buy now buttons showing on the course list view?

Joomdle gives this error on the shop tab: Warning: Creating default object from empty value in /home/midwife/public_html/administrator/components/com_joomdle/helpers/shop.php on line 1087

If that has anything to do with it?

I feel like I've missed a step?

I think we should change how this works now...

It will only show the buy button if the course has a cost in Moodle, ignoring shop price.
I think we should change it to check shop instead, as it makes more sense.

In the meantime, you will need to set a price for the course in Moolde, using for example the joomdle enrol plugin.