edit-comments.php returns plaintext

For the life of me, I’m unsure why this is only happening to edit-comments.php. Whenever I click “Edit comments” it returns the PHP file as plaintext. No other files in the entire wp-admin directory acts this way, and its permissions are exactly the same.

Additionally, I’ve made no modifications to the original wordpress php code. I am using Cherokee webserver, and its top-priority rule is the default PHP handler.

Any suggestions would be greatly appreciated.