Title: [Plugin: Content Types] Plugin does not have a valid header Last modified: August 19, 2016 --- # [Plugin: Content Types] Plugin does not have a valid header * Resolved [Aimee](https://wordpress.org/support/users/greatdanemaniac/) * (@greatdanemaniac) * [15 years, 3 months ago](https://wordpress.org/support/topic/plugin-content-types-plugin-does-not-have-a-valid-header/) * Tried to install it in every possible way, but it’s not working. Says it does not have a valid header. Please fix, thanks! Viewing 15 replies - 1 through 15 (of 17 total) 1 [2](https://wordpress.org/support/topic/plugin-content-types-plugin-does-not-have-a-valid-header/page/2/?output_format=md) [→](https://wordpress.org/support/topic/plugin-content-types-plugin-does-not-have-a-valid-header/page/2/?output_format=md) * Plugin Author [Brian S. Reed](https://wordpress.org/support/users/iambriansreed/) * (@iambriansreed) * [15 years, 3 months ago](https://wordpress.org/support/topic/plugin-content-types-plugin-does-not-have-a-valid-header/#post-1900568) * Fixing now. * Plugin Author [Brian S. Reed](https://wordpress.org/support/users/iambriansreed/) * (@iambriansreed) * [15 years, 3 months ago](https://wordpress.org/support/topic/plugin-content-types-plugin-does-not-have-a-valid-header/#post-1900569) * Sorry about that. Works now. You will probably need to erase the folder from your plugins dir. * Thread Starter [Aimee](https://wordpress.org/support/users/greatdanemaniac/) * (@greatdanemaniac) * [15 years, 3 months ago](https://wordpress.org/support/topic/plugin-content-types-plugin-does-not-have-a-valid-header/#post-1900570) * thanks! * [Bobby Clapp](https://wordpress.org/support/users/dgodfather/) * (@dgodfather) * [15 years, 3 months ago](https://wordpress.org/support/topic/plugin-content-types-plugin-does-not-have-a-valid-header/#post-1900571) * I figured out that part. Now nothing saves, I can’t add fields nor can I hide the areas as suggested. * Plugin Author [Brian S. Reed](https://wordpress.org/support/users/iambriansreed/) * (@iambriansreed) * [15 years, 3 months ago](https://wordpress.org/support/topic/plugin-content-types-plugin-does-not-have-a-valid-header/#post-1900572) * [@dgodfather](https://wordpress.org/support/users/dgodfather/) Did you completely remove the old files? * Plugin Author [Brian S. Reed](https://wordpress.org/support/users/iambriansreed/) * (@iambriansreed) * [15 years, 3 months ago](https://wordpress.org/support/topic/plugin-content-types-plugin-does-not-have-a-valid-header/#post-1900573) * Wait, I think I see an issue. * [Bobby Clapp](https://wordpress.org/support/users/dgodfather/) * (@dgodfather) * [15 years, 3 months ago](https://wordpress.org/support/topic/plugin-content-types-plugin-does-not-have-a-valid-header/#post-1900574) * Deleted the old files. Now I get “Fatal error: Call to undefined function field_type_edit_default() in …wp-content/plugins/content-types-wordpress-plugin/build-fields.php on line 59” * Looks promising though! * Plugin Author [Brian S. Reed](https://wordpress.org/support/users/iambriansreed/) * (@iambriansreed) * [15 years, 3 months ago](https://wordpress.org/support/topic/plugin-content-types-plugin-does-not-have-a-valid-header/#post-1900575) * Yeah. Getting use to the plugin hosting quirks and id10t errors. It’s good to go now. * [Bobby Clapp](https://wordpress.org/support/users/dgodfather/) * (@dgodfather) * [15 years, 3 months ago](https://wordpress.org/support/topic/plugin-content-types-plugin-does-not-have-a-valid-header/#post-1900577) * Hmm… I get to the add new content type page, but when I click the “Add field button” or links to “hide advanced features” it just takes me to the top of the page. * If I hover a link it says “….wp-admin/post-new.php?post_type=content-type#”. * Plugin Author [Brian S. Reed](https://wordpress.org/support/users/iambriansreed/) * (@iambriansreed) * [15 years, 3 months ago](https://wordpress.org/support/topic/plugin-content-types-plugin-does-not-have-a-valid-header/#post-1900579) * JavaScript has to be enabled… * [Bobby Clapp](https://wordpress.org/support/users/dgodfather/) * (@dgodfather) * [15 years, 3 months ago](https://wordpress.org/support/topic/plugin-content-types-plugin-does-not-have-a-valid-header/#post-1900580) * Let me try reinstalling one more time. Javascript is enable. Might be another plugin conflict. * Update: It appears to be in conflict with another plugin. Anyway you could get it to load yours last or something? * I’m testing to find the problem. * Plugin Author [Brian S. Reed](https://wordpress.org/support/users/iambriansreed/) * (@iambriansreed) * [15 years, 3 months ago](https://wordpress.org/support/topic/plugin-content-types-plugin-does-not-have-a-valid-header/#post-1900581) * Thanks. * Plugin Author [Brian S. Reed](https://wordpress.org/support/users/iambriansreed/) * (@iambriansreed) * [15 years, 3 months ago](https://wordpress.org/support/topic/plugin-content-types-plugin-does-not-have-a-valid-header/#post-1900582) * What other plugin? * [Bobby Clapp](https://wordpress.org/support/users/dgodfather/) * (@dgodfather) * [15 years, 3 months ago](https://wordpress.org/support/topic/plugin-content-types-plugin-does-not-have-a-valid-header/#post-1900585) * It doesn’t like the plugin for Simplepress Forums * Plugin Author [Brian S. Reed](https://wordpress.org/support/users/iambriansreed/) * (@iambriansreed) * [15 years, 3 months ago](https://wordpress.org/support/topic/plugin-content-types-plugin-does-not-have-a-valid-header/#post-1900587) * Okay. Downloading that to my test setup and will check out issues. Viewing 15 replies - 1 through 15 (of 17 total) 1 [2](https://wordpress.org/support/topic/plugin-content-types-plugin-does-not-have-a-valid-header/page/2/?output_format=md) [→](https://wordpress.org/support/topic/plugin-content-types-plugin-does-not-have-a-valid-header/page/2/?output_format=md) The topic ‘[Plugin: Content Types] Plugin does not have a valid header’ is closed to new replies. * ![](https://s.w.org/plugins/geopattern-icon/content-types-wordpress-plugin.svg) * [Content Types](https://wordpress.org/plugins/content-types-wordpress-plugin/) * [Frequently Asked Questions](https://wordpress.org/plugins/content-types-wordpress-plugin/#faq) * [Support Threads](https://wordpress.org/support/plugin/content-types-wordpress-plugin/) * [Active Topics](https://wordpress.org/support/plugin/content-types-wordpress-plugin/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/content-types-wordpress-plugin/unresolved/) * [Reviews](https://wordpress.org/support/plugin/content-types-wordpress-plugin/reviews/) * 17 replies * 3 participants * Last reply from: [Brian S. Reed](https://wordpress.org/support/users/iambriansreed/) * Last activity: [15 years, 3 months ago](https://wordpress.org/support/topic/plugin-content-types-plugin-does-not-have-a-valid-header/page/2/#post-1900619) * Status: resolved