I cannot activate the hybrid book I have purchased. I enter the PAC code in the “lock field” but the system suggests that I contact the administrator or the publisher.

Make sure you enter the code including the hyphens, without spaces. Please check that you are not trying to activate a student book on a teacher account. This is frequently not allowed by your book publisher. Visit www.publior.com and verify that your password is valid by clicking on the corresponding category on the website’s footer.