Hi, If you haven't clicked submit yet, I don't think it counts as an attempt.
Please try the following.
(1) Check your browser version on the following page.
-What are the browser and computer requirements for Instructure products?
https://community.canvaslms.com/t5/Canvas-Basics-Guide/What-are-the-browser-and-computer-requirement...
(2) Clear the browser cache.
-How do I clear my browser cache and cookies?
https://community.canvaslms.com/t5/Canvas-Basics-Guide/How-do-I-clear-my-browser-cache-and-cookies/t...
(3) Ask your classmates if they were able to take the test.
(4) Contact your teacher and explain the situation.
If the problem persists, contact your school's help desk or IT department.
I hope this helps.