Agenda doesn’t appear in home page

Hello, I tried to use your plugin to integrate the openagenda calendar to the static home page of our website before contents with no success. It keeps asking for the UID to be filled which already is in the agenda. I get the message “Veuillez fournir un UID d’agenda valide à afficher dans les réglages de l’agenda.”

When i click on the agenda itself everything works fine and events appear (meaning API and UID keys are correct). Although when using the shortcode [openagenda] before the contents I get the error message. What’s wrong ? thanks for any inputs that make this work;

The page I need help with: [log in to see the link]