Content was Blocked because it was not signed by a valid security certificate.

I am taking Success Achieve Success with Emotional Intelligence.  I was watched the Vision and Mission video.  I was attempting to take the Quiz 07, Brain Rewiring Week 07 and Happiness Week 7 and all three are showing an error - Content was blocked because it was not signed by a valid security certificate. 

 

What would I need to do to resolve this?

Any help would be greatly appreciated. 

Thanks

Nohra

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