extra check for comment existence

utils/organiser.py

@@ -25,6 +25,7 @@ def get_comment_from_submission_txt(file_path: str) -> str | None:
         if not no_comment_regex_compile.findall(file_contents):
             regular_expression = f'Comments:\n.*'
             regex_compile = re.compile(regular_expression)
+            if regex_compile.findall(file_contents):
                 match = regex_compile.findall(file_contents)[0]
                 comment = match.split('\n')[1]
                 return comment