Fatal error when activating plugin

When trying to install this plugin I am just getting this error and it fails to activate. Is it still compatible with the latest WordPress?

Fatal error: Cannot redeclare my_mce_buttons_2() in /vhosts/<mydomain>/httpdocs/wp-content/plugins/tinymce-and-tinymce-advanced-professsional-formats-and-styles/tinymce-advanced-professional-formats-and-styles.php on line 171

https://wordpress.org/plugins/tinymce-and-tinymce-advanced-professsional-formats-and-styles/