Post Closed as "off-topic" by Nathan Johnson, Jacob Peattie, rudtek, Howdy_McGee
2 added 10 characters in body
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My client updated her site on her own, and it went down. There were lots of error messages, I found many missing files and put them up, those errors went away, and now this is the error:

Fatal error: Call to undefined function determine_locale() in /home/content/04/5575704/html/wp-includes/script-loader.php on line 1096

Fatal error: Call to undefined function determine_locale() in /home/content/04/5575704/html/wp-includes/script-loader.php on line 1096

My client updated her site on her own, and it went down. There were lots of error messages, I found many missing files and put them up, those errors went away, and now this is the error:

Fatal error: Call to undefined function determine_locale() in /home/content/04/5575704/html/wp-includes/script-loader.php on line 1096

My client updated her site on her own, and it went down. There were lots of error messages, I found many missing files and put them up, those errors went away, and now this is the error:

Fatal error: Call to undefined function determine_locale() in /home/content/04/5575704/html/wp-includes/script-loader.php on line 1096

1
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Fatal error after update

My client updated her site on her own, and it went down. There were lots of error messages, I found many missing files and put them up, those errors went away, and now this is the error:

Fatal error: Call to undefined function determine_locale() in /home/content/04/5575704/html/wp-includes/script-loader.php on line 1096