Drupal 9 is end-of-life as of November 1, 2023
https://www.drupal.org/about/announcements/blog/drupal-9-is-end-of-life →
Fixed
1.0
Code
This would also bump the minimum PHP version to core's min of 8.1, and the requirement in CSP's own composer.json could be removed.
Issue #3407204: Remove support for D9
Automatically closed - issue fixed for 2 weeks with no activity.