I am sorry you are having an issue, I know that can be frustrating.
I would love to help, but I will need more information to understand the issue.
1. What is the CRN of the course (5 digit number starting with 2) What is the course number and name causing the issue?
2. Please send a screenshot of the entire screen including the address bar demonstrating the issue you are having.
3. What are you doing in the course or where exactly are you clicking when you get the issue or to the screenshot above
4. If you haven't already, contact the instructor directly about this issue, so they know what is going on.
Send me any other information that you think will be helpful for me to better understand the issue and get you back on track. :-)