Error when posting: ‘Call to undefined function’

  • I set up a new template and when I try to make a post, although I can save the post, when I try to view it I get the following message:

    Fatal error: Call to undefined function: language_attributes() in /home/jessicas/public_html/CurrentProjects/wp-content/themes/upstart-blogger-modicus-01/header.php on line 2

    I don’t even know where to start in the codex to figure this out-

    any help will be much appreciated!

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