Can't access programming assignments

I have already subscribed to the deep learning specialization.I am asked to have a subscription when trying to open programming assignments.A lock image is displayed.

I accidentally deleted all files pertaining to ‘Trigger word detection’ assignment of C5W3.Is this the reason behind this issue.How can I fix this?

Please read this link to reset your workspace.

Solution to my problem is not listed in this article.I am asked to subscribe to the course which I have already subscribed.I am denied access to everything related to assignments.All I can see is a lock image.

I was responding to this post:

To address subscription issues, please contact coursera support.

The issue has been resolved. Thanks for your assistance. @balaji.ambresh.