Moving Server – Errors after move

I am currently trying to move my site from 1 server to another. I have transfered all the files and imported the database, which went fine… but the site isn’t appearing as it should.

My current “live” site is at https://www.national-stage.co.uk

My transfered “new server” is at https://www.northern-stage.co.uk

It doesn’t look like the CSS is working and there are 2 errors in the header:

Warning: include_once(acf-image-crop/acf-image-crop.php): failed to open stream: No such file or directory in /homepages/1/d100789809/htdocs/NST_Wordpress/LIVE_Site/wp-content/themes/NationalStage/functions.php on line 107

Warning: include_once(): Failed opening 'acf-image-crop/acf-image-crop.php' for inclusion (include_path='.:/usr/lib/php5.6') in /homepages/1/d100789809/htdocs/NST_Wordpress/LIVE_Site/wp-content/themes/NationalStage/functions.php on line 107