Title: Problems with installing plugins (widgitizing my theme) Last modified: August 19, 2016 --- # Problems with installing plugins (widgitizing my theme) * [fegul](https://wordpress.org/support/users/fegul/) * (@fegul) * [16 years, 5 months ago](https://wordpress.org/support/topic/problems-with-installing-plugins-widgitizing-my-theme/) * So I’ve been looking for a working Google Calendar plugin and so far I haven’t found one that works with my custom theme. * wpng-calendar: When I install this plugin, I get a notice in Firebug saying that a particular function is not defined. It’s strange because once I widgetize my theme it should automatically include the required files in the header right? * I used this guide to widgetize my theme: [http://www.quickonlinetips.com/archives/2007/11/how-to-widget-enable-wordpress-themes-in-3-easy-steps/](http://www.quickonlinetips.com/archives/2007/11/how-to-widget-enable-wordpress-themes-in-3-easy-steps/) * However all of the required js files are not included in the head of the document when I drag the widget into the sidebar that I’ve defined. * Any ideas? Viewing 1 replies (of 1 total) * Thread Starter [fegul](https://wordpress.org/support/users/fegul/) * (@fegul) * [16 years, 5 months ago](https://wordpress.org/support/topic/problems-with-installing-plugins-widgitizing-my-theme/#post-1328825) * I found the problem, I needed to add `` inside the tags of my header.php file * Now the external scripts that my plugins use are being loaded in the page Viewing 1 replies (of 1 total) The topic ‘Problems with installing plugins (widgitizing my theme)’ is closed to new replies. ## Tags * [widget](https://wordpress.org/support/topic-tag/widget/) * 1 reply * 1 participant * Last reply from: [fegul](https://wordpress.org/support/users/fegul/) * Last activity: [16 years, 5 months ago](https://wordpress.org/support/topic/problems-with-installing-plugins-widgitizing-my-theme/#post-1328825) * Status: not resolved ## Topics ### Topics with no replies ### Non-support topics ### Resolved topics ### Unresolved topics ### All topics