Mu-plugins information appears on the head

[fydy]

Mu-plugins information appears on the head：

[DSaxon]

I have also encountered this. Have you been able to find a solution?

[wzul]

This because the symlink (Symbolic Link) file is broken.

https://github.com/xyu/heroku-wp/tree/master/public/wp-content/mu-plugins

Fix the symlink file on the directory as per shown or if you are not using the plugin, you may delete it.