Title: Theme development problems!
Last modified: August 19, 2016

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# Theme development problems!

 *  [mafffs](https://wordpress.org/support/users/mafffs/)
 * (@mafffs)
 * [15 years, 3 months ago](https://wordpress.org/support/topic/theme-development-problems/)
 * Hello!
 * Recently started developing my own theme and can’t get it working properly.
 * I started with a blank theme called BLANK ([http://digwp.com/2010/02/blank-wordpress-theme/](http://digwp.com/2010/02/blank-wordpress-theme/)).
   The problem is that i can’t get any plugins working(such as lightbox 2) and when
   I publish a post I sometimes get a warning or I just end up on a empty white 
   page and have to type in the correct URL to go back to my site.
 * I use MAMP and can’t login from time to time either.
 * Anybody got any clue what the problem might be or any solution to share I would
   be very thankful!
 * thanks!

Viewing 3 replies - 1 through 3 (of 3 total)

 *  Thread Starter [mafffs](https://wordpress.org/support/users/mafffs/)
 * (@mafffs)
 * [15 years, 3 months ago](https://wordpress.org/support/topic/theme-development-problems/#post-1943446)
 * …here’s a warning I get when I try to upload a new thumbnail:
 * Warning: Cannot modify header information – headers already sent by (output started
   at /wp-content/themes/StrangersCandy/functions.php:35) in /wp-admin/async-upload.
   php on line 26
    20
 * Line 35 in functions.php is the thumbnail support: <?php add_theme_support( ‘
   post-thumbnails’ ); ?>
 *  [phenomenoodle](https://wordpress.org/support/users/phenomenoodle/)
 * (@phenomenoodle)
 * [15 years, 3 months ago](https://wordpress.org/support/topic/theme-development-problems/#post-1943485)
 * Do you have `<?php wp_head(); ?>` in your header.php file and `<?php wp_footer();?
   >` in footer.php?
 *  Thread Starter [mafffs](https://wordpress.org/support/users/mafffs/)
 * (@mafffs)
 * [15 years, 3 months ago](https://wordpress.org/support/topic/theme-development-problems/#post-1943494)
 * Yes.

Viewing 3 replies - 1 through 3 (of 3 total)

The topic ‘Theme development problems!’ is closed to new replies.

 * 3 replies
 * 2 participants
 * Last reply from: [mafffs](https://wordpress.org/support/users/mafffs/)
 * Last activity: [15 years, 3 months ago](https://wordpress.org/support/topic/theme-development-problems/#post-1943494)
 * Status: not resolved

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