[wcfm_vendor_membership] not displaying as expected

Hello,

Sorry to bother you but I was hoping that someone might be able to help with this one.

We have used the [wcfm_vendor_membership] shortcode in one of our pages but it does not seem to be displaying the content as expected.

I have tried disabling some plugins and also switching to a different theme but I also get the same result.

Here is a screenshot of what we see.

Does anyone have an idea on how we could fix it please?

Many thanks