Title: theme activation issues
Last modified: August 20, 2016

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# theme activation issues

 *  [joe_roma](https://wordpress.org/support/users/joe_roma/)
 * (@joe_roma)
 * [15 years ago](https://wordpress.org/support/topic/theme-activation-issues/)
 * Hi – It seems that I have successfully uploaded 2 different themes via FTP (as
   I see theme on my theme page), however when I click on Preview or try to Activate
   it, I get an error message:
    Fatal error: Call to undefined function body_class()
   in /nas01/HostingVol1/49/42549/joeroma.com/nic_wordpress/wp-content/themes/oulipo/
   header.php on line 25
 * Any thoughts on how to activate? I assume that since it’s sitting in the Themes
   section, it has uploaded properly. Help! And thanks – Joe

The topic ‘theme activation issues’ is closed to new replies.

## Tags

 * [activate](https://wordpress.org/support/topic-tag/activate/)

 * 0 replies
 * 1 participant
 * Last reply from: [joe_roma](https://wordpress.org/support/users/joe_roma/)
 * Last activity: [15 years ago](https://wordpress.org/support/topic/theme-activation-issues/)
 * Status: not resolved

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