The site (https://estrajans.ru/provincialnyj-tanec-noty-dlja-detskogo-jestradnogo-ansamblja/) page has the text of warnings about errors in the code shortcodes.php:
Warning: Illegal string offset ‘echo’ in /home/virtwww/w_estrajans-ru_c8fa889c/http/wp-content/plugins/download-attachments/includes/shortcodes.php on line 66 Warning: Illegal string offset ‘title’ in /home/virtwww/w_estrajans-ru_c8fa889c/http/wp-content/plugins/download-attachments/includes/shortcodes.php on line 69 Warning: Cannot assign an empty string to a string offset in /home/virtwww/w_estrajans-ru_c8fa889c/http/wp-content/plugins/download-attachments/includes/shortcodes.php on line 69 Warning: Illegal string offset ‘title’ in /home/virtwww/w_estrajans-ru_c8fa889c/http/wp-content/plugins/download-attachments/includes/shortcodes.php on line 72
How do I fix plugin work?