Unfortunately, there isn’t going to be anything simple I can tell you to make it work again. It sounds like you have an infinite loop condition. All I can to is make guesses that I cannot test.
The first thing I would do is to see if it has something to do with the formatting of the value. Replace your line of code with
<?php the_field('shop_the_look_code', false, false); ?>
what that will do is bypass all of the formatting of that field value so that you can eliminate it as a cause or determine that formatting is the issue.
Welcome to the Advanced Custom Fields community forum.
Browse through ideas, snippets of code, questions and answers between fellow ACF users
Helping others is a great way to earn karma, gain badges and help ACF development!
The ACF site is currently experiencing some issues.— Advanced Custom Fields (@wp_acf) September 29, 2022
We apologize for the inconvenience and we are working hard to get it back up and running as soon as possible.
© 2022 Advanced Custom Fields.