I just installed 5.0.13
I clicked on the RENEW button to an existing course. I was prompted with a dialog box:
You still have 1036 Days available for this course. Would you like to add time to your subscription? Click Yes to add time to your plan. Click Cancel to go to the course page.
When I click CANCEL I get redirected to this page which is blank for me.
https://MYSITE/iJoomla.html?controller=guruPrograms