Enfold visual editor broken since WP Update

Hi, I have been having Problems with the visual editor in the enfold theme since the WP Update to 5.4.1. An update of the Enfold Theme to version 4.7.4 hasn’t made any difference. There is still a shortcode window with the quelle code at the top of the page in the visual editor. If I switch to WP-classic editor in the main settings I become a message that an error has occoured. In debug mode the error is as below. What can I do to repair the instalation.

constant ‘init’ – assumed ‘‘init’’ (this will throw an Error in a future version of PHP) in /var/www/html/wordpress/wp-content/themes/enfold/functions.php on line 779
Deprecated: contextual_help ist seit Version 3.3.0 veraltet! Benutze stattdessen get_current_screen()->add_help_tab(), get_current_screen()->remove_help_tab(). in /var/www/html/wordpress/wp-includes/functions.php on line 5088

Thanks in advance for your help.