Hello,
Please read our documentation https://www.8theme.com/demo/docs/legenda/#!/installation_upgrade and make sure that your server meets the described requirements.
https://www.8theme.com/videos/ (Legenda WordPress Theme – Installation)
You need to enter your purchase code to activate our new theme version.
The wp-admin credentials are incorrect. Please check them. Feel free to ask if you have any questions, also provide FTP access.
Regards,
Rose Tyler.