- There is still a master branch, make sure to set the correct default branch: https://www.drupal.org/node/1659588 . Then remove the master branch, see also step 6 and 7 in https://www.drupal.org/node/1127732
- Your README.txt does not follow best practices (headings need to be uppercase). See https://www.drupal.org/node/2181737 .
- The INTRODUCTION section is missing.
- The REQUIREMENTS section is missing.
- The INSTALLATION section is missing.
- The CONFIGURATION section is missing.
- Remove LICENSE.txt, it will be added by drupal.org packaging automatically.
- No automated test cases were found, did you consider writing PHPUnit tests? This is not a requirement but encouraged for professional software development.