Notice: Undefined index: theme_categories error Home › Forums › Newsletter Plugin Support › Notice: Undefined index: theme_categories error This topic has 1 reply, 1 voice, and was last updated 7 years, 7 months ago by calebbender. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts February 1, 2016 at 2:17 pm #20418 calebbenderParticipant When I sent a test message through the Newsletter plugin for a newsletter I set up I get the following error. Notice: Undefined index: theme_categories in E:\XXX\XXXX.com\wwwroot\wp-content\plugins\newsletter\emails\themes\theme-3\theme.php on line 32 What does this mean and how do I fix it? Thanks February 3, 2016 at 3:16 pm #20466 calebbenderParticipant Anyone? Author Posts Check out our premium plans with priority support. Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In