Fatal error: Uncaught Error when posting a comment to a question

Getting this error message:
Fatal error: Uncaught Error: Call to undefined function dwnotif_add_user_notify() in C:\Apps\Apache\htdocs\wp_hd\wp-content\plugins\dw-notifications\inc\integrations\dwqa\loader.php:171 Stack trace: #0 C:\Apps\Apache\htdocs\wp_hd\wp-includes\class-wp-hook.php(286): DWNOTIF_DWQA->dwnotif_insert_comment(199, Object(WP_Comment)) #1 C:\Apps\Apache\htdocs\wp_hd\wp-includes\class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array) #2 C:\Apps\Apache\htdocs\wp_hd\wp-includes\plugin.php(465): WP_Hook->do_action(Array) #3 C:\Apps\Apache\htdocs\wp_hd\wp-includes\comment.php(1891): do_action(‘wp_insert_comme…’, 199, Object(WP_Comment)) #4 C:\Apps\Apache\htdocs\wp_hd\wp-content\plugins\dw-question-answer-pro\inc\Handle.php(334): wp_insert_comment(Array) #5 C:\Apps\Apache\htdocs\wp_hd\wp-includes\class-wp-hook.php(286): DWQA_Handle->insert_comment(”) #6 C:\Apps\Apache\htdocs\wp_hd\wp-includes\class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array) #7 C:\Apps\Apache\htdocs\wp_hd\wp-includes\plugin.php(465): WP_Hook->do_action(A in C:\Apps\Apache\htdocs\wp_hd\wp-content\plugins\dw-notifications\inc\integrations\dwqa\loader.php on line 171
When posting a comment to a question. 
If I go back to the post it’s posted but also a copy of what I posted is in the comment field.