Great! Glad to hear I don't need the functions.php
I'm trying to work with "promotions slider". I have followed the video tutorial. I get this error
Notice: Undefined index: _promo_slider_disable_links in /home2/treeparl/public_html/testing/wp-content/plugins/promotion-slider/index.php on line 275
Notice: Undefined index: _promo_slider_show_ad_code in /home2/treeparl/public_html/testing/wp-content/plugins/promotion-slider/index.php on line 275
Warning: Cannot modify header information - headers already sent by (output started at /home2/treeparl/public_html/testing/wp-content/plugins/promotion-slider/index.php:275) in /home2/treeparl/public_html/testing/wp-includes/pluggable.php on line 866
I've uninstalled and installed the plugin a few times, but still get the error. Therefore I figured I needed something I am missing.