Accounts which had encrypted passwords in Plesk Panel database are not able to login into Plesk after an upgrade to version 10.x. The following error is displayed:
Error: You have entered incorrect username or password.
Plesk Panel versions had an ability to perform migration from the hosting platforms, which store the encrypted passwords for accounts of various levels in the database. In order to avoid the necessity of resetting such passwords during the migration procedure, Plesk Panel is able to manipulate the encrypted passwords. Such capability has been abandoned in Plesk Panel version 10.x.
Plesk Panel users who have encountered this issue should use the "Forgot your password ?
" link available on the login page to reset the current password.