In the drop-down menu next to Public Calendar choose Full details
Again, right-click on your calendar and choose permissions...
Right-click on Subscribe to Calendar
and choose Copy shortcut
Go to Tools/Internet Options
Click the security tab
Select Trusted sites and then click the Sites button.
Type in gemini.com and click the Add button
Now, ensure that the "Require server verification..." check box is not checked. Then click the close button.
Now close the browser, reopen the browser and try taking the course again.
Safety in Schools Foundation of Canada