MySQL_class: Database Error occured!

 CODE: -1
 DESC: N/A
 FILE: index.php
QUERY: select * from itf_comments where parent_comment_id is null and topic_id= and topic_type=5 and status='1' order by id asc
 QCNT: 7
 INFO: QueryResult('select * from itf_comments where parent_comment_id is null and topic_id= and topic_type=5 and status='1' order by id asc') failed!

Please inform info@webdrawsolution.com about this problem.
PHP v7.2.30-1+ubuntu18.04.1+deb.sury.org+1 / MySQL Class v0.36