Hi David, thanks for this advice. Made a lot of sense. I tried activating a different theme and the message still came up when I tried to activate Landing Pages.
Plugin could not be activated because it triggered a fatal error.
Parse error: syntax error, unexpected T_FUNCTION in /home3/larousse/public_html/wp-content/plugins/landing-pages/landing-pages.php on line 124
Switched back to my regular theme, deactivated all plugins and then activated Landing Pages and the same message occurred.
Anything else I can try?