BackuPs on "[Plugin: Disable Author Pages] notice warning. can you pls fix?"

Hi

when you enable Redirect non exists author pages a 404 on your website throws a notice warning.

Notice: Trying to get property of non-object in wp-includes/post-template.php on line 29

Can you pls correct the code?

Thnx

B.

https://wordpress.org/plugins/disable-author-pages/