Hello, @corina and 
Welcome to the Canvas Community! Without being able to look directly at your device, I can think of a few reasons that this is happening. First, check the browser you're using to access Canvas, as it might be out of date and not supported. Which browsers does Canvas support? lists current versions, so if your browser is older than those listed, update as needed.
Once you've established that your browser is up to date, and if you still find that clicking on Modules leads to a blank page, ask the course instructor to examine the module content. The quickest way to do that is to send them a direct message through the Canvas Inbox, as detailed in How do I send a message to a user in a course in the Inbox as a student?
Good luck, Corina. Stay safe, and be well.
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