First, check the Start and End dates on the submission folder. If you are trying to submit a file outside these dates, you need to contact your instructor.
The other most common issue with file upload errors is the file name or extension. Assure your file name avoids special characters.
Example of good file names:
- filename.pdf
- filename.docx
Special characters to avoid in the file name:
- Slashes ("/")
- Ampersands ("&")
- Colons (":")
- Question marks ("?")
- Quotation marks ("''")
- Pound signs or hashtags ("#")
- Asterisks ("*")
For the extension, make sure the file you are submitting has not been restricted. On the submission screen, look for "Allowed File Extensions." If nothing is listed, then there are no restrictions.