- The person logged in the Add-On Explorer does not have access to a license with the product they want to download. The user logged in with the wrong e-mail.
- The Licensed End User logged in the Add-On Explorer does not have Download Permissions given to them for that product on the license
- Sign out of the user's MathWorks Account in the GUI of MATLAB.
- Then sign into the MathWorks Account of the user in the MATLAB GUI. Make sure to sign in with the e-mail address associated with your MATLAB license.
- If the sign-in window freezes while signing in, restart MATLAB and sign in again.