You can't open your class or submit assignments. Other problems might also be related
to this
issue.
Some non-Cengage browser extensions have been observed to interfere with accessing WebAssign classes or completing assignments.
Solution
Depending on the symptoms you see, there might be other solutions to try first, such as checking the assignment due date or verifying that you are enrolled in the class. If other solutions do not work, try disabling your browser extensions and signing in to WebAssign again.