Error message

• Warning: Attempt to read property "field_couleur" on bool in cievendredi_preprocess_html() (line 22 of sites/all/themes/cievendredi/template.php).
• Warning: Trying to access array offset on value of type null in cievendredi_preprocess_html() (line 22 of sites/all/themes/cievendredi/template.php).
• Warning: Trying to access array offset on value of type null in cievendredi_preprocess_html() (line 22 of sites/all/themes/cievendredi/template.php).
• Warning: Trying to access array offset on value of type null in cievendredi_preprocess_html() (line 22 of sites/all/themes/cievendredi/template.php).