Getting Error on Login

I am suddenly getting an error when I try to login to a clients wordpress account

The login page comes up, but at the top are these errors

Warning: Cannot modify header information – headers already sent by (output started at /home2/rentonpr/public_html/newsite/wp-config.php:153) in /home2/rentonpr/public_html/newsite/wp-login.php on line 255

Warning: Cannot modify header information – headers already sent by (output started at /home2/rentonpr/public_html/newsite/wp-config.php:153) in /home2/rentonpr/public_html/newsite/wp-login.php on line 267

I looked in the code but didn’t see what the problem was.

Then when I login this page comes up.

Warning: Cannot modify header information – headers already sent by (output started at /home2/rentonpr/public_html/newsite/wp-config.php:153) in /home2/rentonpr/public_html/newsite/wp-login.php on line 255

Warning: Cannot modify header information – headers already sent by (output started at /home2/rentonpr/public_html/newsite/wp-config.php:153) in /home2/rentonpr/public_html/newsite/wp-login.php on line 267

Warning: Cannot modify header information – headers already sent by (output started at /home2/rentonpr/public_html/newsite/wp-config.php:153) in /home2/rentonpr/public_html/newsite/wp-includes/pluggable.php on line 649

Warning: Cannot modify header information – headers already sent by (output started at /home2/rentonpr/public_html/newsite/wp-config.php:153) in /home2/rentonpr/public_html/newsite/wp-includes/pluggable.php on line 650

Warning: Cannot modify header information – headers already sent by (output started at /home2/rentonpr/public_html/newsite/wp-config.php:153) in /home2/rentonpr/public_html/newsite/wp-includes/pluggable.php on line 651

Warning: Cannot modify header information – headers already sent by (output started at /home2/rentonpr/public_html/newsite/wp-config.php:153) in /home2/rentonpr/public_html/newsite/wp-includes/pluggable.php on line 850

the site address is https://www.rentonprintery.com/newsite which comes up fine. I just need to get in and make the changes to move this out of it’s subfolder.

Any help would be appreciated. I did find one other thread on something kind of like this, but not exactly.