Hi there.
Whenever I go to "All WCPS Layouts" and go to edit my slider, there's an error message appearing at the bottom saying:
"There has been a critical error on this website. Please check your site admin email inbox for instructions." This is happening when I'm following the instructions from the YT video "Customize your layouts," specifically when I attempt to push the "Post title" button.
I also get an error message sent to my email from WordPress that there's been a technical issue with the plugin, and I have to go into recovery mode to restart the plugin.
Thank you for your help!

Welcome to our forum.
Are you using our WCPS plugin for WooCommerce or something else? we have checked the plugin and it not showing any errors, could you please enable debug and debug log
define( 'WP_DEBUG', true );
define( 'WP_DEBUG_LOG', true );
https://wordpress.org/support/article/debugging-in-wordpress/
And please check debug.log file to check the error from our plugin.