Community Q&A:

Fatal Error after Theme Update

Asked by:
HubFans / n/a Points Time:
2016-10-01 8:37 pm EST Category:
Wordpress Hits:
346
After updating the twenty-fourteen theme to version 1.8 I receive the following error message:
Fatal error: Call to undefined function is_customize_preview() in /home/micha290/public_html/wp-content/themes/twentyfourteen/inc/widgets.php on line 40

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ANSWERS

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christopherm
Staff
1,348 Points
2016-10-03 3:19 pm EST
Hello,

Thank you for your question about the "Call to undefined function" error. This usually indicates that a piece of code in the function file is missing critical data. You'll want to make sure that you were installing a verified version of twenty-fourteen downloaded directly from WordPress, unless it was a "child theme" developed by a third party. In the latter case you will want to check with the developer. I also recommend checking our guide on common WordPress troubleshooting.

Best,
Christopher M.

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