Hi, the widget to validate the certificates doesn't do anything, I searched for other people with the same problem and found a post with a similar issue and you said the user to set the Fallback Certificate Page at wplms->Course manager->. However, in the
image attached by you in that post, you set a page -Activity1- that I can't find in the list of installed pages in my site. When I put any other page, the plugin calls that page but its the same info if the code exists or not, I imagine that's because the pages I'm using are not the right one.
Maybe one page was lost in the installation.
Thanks in advance,
Medardo.