@chloezoe06
There are a number of things that could be going on. I hope you were able to solve this, but if not, here are some tips.
1. Always check Which browsers does Canvas support? and make sure you are using a supported browser.
2. Here is the section of guides on assignments for students. Looking through these may help you?
3. https://community.canvaslms.com/docs/DOC-10566-4212191416 may be specifically helpful
4. If it checks out that everything looks good on your end you will want to message your instructor to make sure they have made the assignment available to you!
