401 Error - HMAC-SH256 (D2L)
Error Code Cause
Users will see this error when they click a link to view a VitalSource eTextbook inside their LMS, but an Incorrect OAuth Signature method was used during the initial configuration.
Student / Faculty
- Please reach out to your instructor and inform them of the error so they may reach out to the team that configured the link inside your institution's LMS.
- Update the LTI Tool in the LMS to use the OAuth Signature method: "HMAC-SHA1"
- If you received notice of the error, test the link to see if the publisher enabled rights to the title.