_excerpt and _content

Edit the file via FTP and change it back.

Might it be

// Limit Post Word Count
function new_excerpt_length($length) {
return 50;

or

//Replace Excerpt Link
function new_excerpt_more($more) {

Are you sure that the original function was the_news_excerpt? Could it have been new_excerpt()? If so, try just changing new_excerpt() to the_content();.

It appears as the_news_excerpt() in post-entry.php and new_excerpt_length and new_excerpt_more in functions.php

Are they the same things do you think?

No. If the_news_excerpt() appears in post-entry.php, then it has to be defined somewhere else in the theme. It’s not a core WordPress function.

I found this by searching for “the_news_excerpt”

https://pippinspages.com/tutorials/better-wordpress-post-excerpt-revamped/

It seems to be a function someone made to extend the _excerpt original function in some themes.

Hope it helps