Tag error:  ->  Textpattern Warning: Tag opening/closing mismatch: <txp:if_section name="">…</txp:if_search>. while parsing form None on page default

Fatal error: Uncaught Error: Call to undefined function mysql_real_escape_string() in /srv/data/web/vhosts/radiofreemike.net/htdocs/textpattern/plugins/zem_contact_reborn/zem_contact_reborn.php:46 Stack trace: #0 [internal function]: zem_contact(Array, NULL) #1 /srv/data/web/vhosts/radiofreemike.net/htdocs/textpattern/vendors/Textpattern/Tag/Registry.php(137): call_user_func('zem_contact', Array, NULL) #2 /srv/data/web/vhosts/radiofreemike.net/htdocs/textpattern/lib/txplib_publish.php(559): Textpattern\Tag\Registry->process('zem_contact', Array, NULL) #3 /srv/data/web/vhosts/radiofreemike.net/htdocs/textpattern/lib/txplib_publish.php(403): processTags('zem_contact', 'to="editor@radi...', NULL) #4 /srv/data/web/vhosts/radiofreemike.net/htdocs/textpattern/publish/taghandlers.php(2993): parse('\t<p>You can con...') #5 /srv/data/web/vhosts/radiofreemike.net/htdocs/textpattern/publish/taghandlers.php(3027): txp_sandbox(Array, NULL) #6 [internal function]: body(Array, NULL) #7 /srv/data/web/vhosts/radiofreemike.net/htdocs/textp in /srv/data/web/vhosts/radiofreemike.net/htdocs/textpattern/plugins/zem_contact_reborn/zem_contact_reborn.php on line 46