Check that you have entered your e-mail address correctly
Check that the e-mail address you have entered is the same as the one you used to set up your account
Check that the password you entered is the same as the one you used to set up your account (otherwise click on «Forgotten your password?»)
Make sure that the Accor mobile application or website is not undergoing maintenance: Check «Your support space» at the top of the page to see whether there is a message regarding downtime