Plesk will lock out accounts if multiple
failed attempts to login are registered. The default is to lock
accounts for 30 minutes after 3 failed attempts. Attempting to login
with an account that has been locked out will result in an “Access
Denied” pop up - even if the password used is correct.
If you
cannot wait for the account to become unlocked, you can manually unlock
it by removing the database entry from the lockout table in psa.
Login into your server via ssh and run this command:
[root@plesklinux root]# mysql -uadmin -p`cat /etc/psa/.psa.shadow` psa -e ‘DELETE FROM lockout’
[root@plesklinux root]#