Hello @HELP613 ...
Is the resource that the student is trying to access a link to a document, image, or other area of the Canvas course? When you look at the URL of your course in the browser's address bar, does the Course ID number (the number after /courses/#####) match the number in the URL at the bottom of your browser when you hover your mouse over the link? If those two numbers do not match, this usually means that the link is pointing to another course that the student does not have access to. Sometimes, people try to copy and paste links from one course to another, but this is no advised because it makes links for students inaccessible. I'm not sure if this will apply in your case, but it's something to investigate for your situation.
I hope this will help a bit. Sing out if you have any other questions...thanks! Take care, stay safe, and be well.
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