If you have already signed up to our online "Selenium WebDriver API With Java" Online training course then the login links might have changed. We have had to use multiple online platforms over the years to offer the course due to various changes in terms and conditions by each site. The dates refer to when you purchased the course. The course is updated on all sites but you will have a login for one of the sites.
Zenler migrated to a new domain newzenler.com, they migrated the accounts but if you haven't logged in there before then you need to reset your password from the login page to activate your account on newzenler.com
Teachable was initially named UseFedora so you might have initially seen that name on your course documentation.
Login using the link on the top right of the screen, or the Login Link