cant access wp-admin (localhost)

I cannot access the admin area of wordpress any more after a modification on my database table wp_options on the option siteurl and home. I have changed it back on the normal settings it was before and I can see the website I have build so far with some errors though, but can not access the admin area. I have some errors that dont know what they mean (new wordpress user). When I check the line in the file where the error is, its cookies settings.

!!You have to make changes in your wp_options table, you need to change two entries: option id 1 – siteurl – change localhost to https://<your local ip>; option id 2 – home – change localhost to https://<your local ip> !!

This is the settings I changed into my database originally and when I saw its not working I panicked and changed it back as it was but cant access the admin area. Any help guys much appreciated.

Error messages in wp-login screen:

Warning: Header may not contain more than a single header, new line detected in C:\xampp\htdocs\name\wp-login.php on line 434 and 436

Warning: Header may not contain more than a single header, new line detected in C:\xampp\htdocs\name\wp-includes\pluggable.php on line 948 – 969