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Their website is on WordPress. I added two plugins ACF (Advanced Custom Fields) and CPT (Custom Post Types). I was only beginning to test it out. Once I realized it screwed up the website I deleted what I created in the ACF and CPT UIs and deactivated the plugins and even deleted them but now I get this error:**Fatal error**: Uncaught Error: Call to undefined function the\_field() in /home/kz5tstib5xjl/public\_html/wp-content/themes/(removed company name)/header.php:31Is anyone able to please help???
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Honestly, in your situation, I would just get in touch with the hosting company and ask for a backup restore to before you touch the thing and call it a day.
This is why a staging site is recommended when doing work on a site.