getting this errors:

Warning: include(.php): failed to open stream: No such file or directory in /homepages/12/x/htdocs/escape/wp-content/plugins/testimonial-add/mpsp_shortcode_gen.php on line 15

Warning: include(): Failed opening ‘.php’ for inclusion (include_path=’.:/usr/lib/php7.1′) in /homepages/12/x/htdocs/escape/wp-content/plugins/testimonial-add/mpsp_shortcode_gen.php on line 15