When i click on them , i am unable to see the messages.
Welcome to the Canvas Community!!!
You have asked your question in the public Canvas Community forum. We do not have access to your instance of Canvas and cannot see what you are seeing. I would recommend reaching out to your instructor and let them know that you are having issues with the Announcements and Discussions.
Just for future reference:
How do I reply to a discussion as a student?
How do I view Announcements as a student?
Thank you for your help.
Retrieving data ...