Fatal error: Uncaught PHPParser_Error: Syntax error

Hi,
When I go to the wpt_test_respondents_results page I see under the results section an error:

Fatal error: Uncaught PHPParser_Error: Syntax error, unexpected ‘-‘ on line 1 in /home/psifascoil/public_html/wp-content/plugins/wp-testing/vendor/nikic/php-parser/lib/PHPParser/Parser.php:1098 Stack trace: #0 /home/psifascoil/public_html/wp-content/plugins/wp-testing/src/Model/Compilable.php(229): PHPParser_Parser->parse(‘<?php – — -<=5…’) #1 /home/psifascoil/public_html/wp-content/plugins/wp-testing/src/Model/Compilable.php(155): WpTesting_Model_Compilable->substitute() #2 /home/psifascoil/public_html/wp-content/plugins/wp-testing/src/Model/Formula.php(69): WpTesting_Model_Compilable->compile() #3 /home/psifascoil/public_html/wp-content/plugins/wp-testing/src/Model/Passing.php(295): WpTesting_Model_Formula->isTrue() #4 /home/psifascoil/public_html/wp-content/plugins/wp-testing/src/Widget/PassingTable/Admin.php(177): WpTesting_Model_Passing->buildResults() #5 /home/psifascoil/public_html/wp-content/plugins/wp-testing/src/Widget/ListTable.php(208): WpTesting_Widget_PassingTable_Admin->render_static_column(Object(WpTest in /home/psifascoil/public_html/wp-content/plugins/wp-testing/vendor/nikic/php-parser/lib/PHPParser/Parser.php on line 1098

Can you please help?
Regards,
Ram