No longer works

With WP 5.2 it generates errors of the form:

Warning: “continue” targeting switch is equivalent to “break”. Did you mean to use “continue 2”? in /public_html/wp-content/plugins/wp-markdown/markdownify/markdownify.php on line 299

Warning: Cannot modify header information – headers already sent by (output started at /public_html/wp-content/plugins/wp-markdown/markdownify/markdownify.php:299) in /public_html/wp-admin/includes/misc.php on line 1196