Title: No Valid Header Last modified: June 1, 2017 --- # No Valid Header * Resolved [pecktron2000](https://wordpress.org/support/users/pecktron2000/) * (@pecktron2000) * [8 years, 11 months ago](https://wordpress.org/support/topic/no-valid-header-14/) * Hi, When I go to activate the plugin, I get a message that says ‘the plugin does not have a valid header’ Viewing 11 replies - 1 through 11 (of 11 total) * Plugin Author [Jordy Meow](https://wordpress.org/support/users/tigroumeow/) * (@tigroumeow) * [8 years, 11 months ago](https://wordpress.org/support/topic/no-valid-header-14/#post-9188993) * Hi, * Can you have a look at your PHP Error Logs? * Alternatively, in the file core.php of the plugin, can you change this line: * > time DATETIME DEFAULT ‘0000-00-00 00:00:00’ NOT NULL, * to: * > time DATETIME NULL, * Can you try? * [ynk](https://wordpress.org/support/users/ynk/) * (@ynk) * [8 years, 11 months ago](https://wordpress.org/support/topic/no-valid-header-14/#post-9195216) * It wont work. I just follow your instruction, but no luck. I got similar message after changing the core.php.’the plugin does not have a valid header’ - This reply was modified 8 years, 11 months ago by [ynk](https://wordpress.org/support/users/ynk/). * [customle](https://wordpress.org/support/users/customle/) * (@customle) * [8 years, 11 months ago](https://wordpress.org/support/topic/no-valid-header-14/#post-9203620) * I’m having the same problem. * Plugin Author [Jordy Meow](https://wordpress.org/support/users/tigroumeow/) * (@tigroumeow) * [8 years, 11 months ago](https://wordpress.org/support/topic/no-valid-header-14/#post-9203870) * When this happens, with my plugin or any other, you absolutely need to look at your PHP Error Logs. Without it, it’s impossible to know where it is coming from. The plugin works on all installs but apparently, you are 2 or 3 with this issue, so there might be a DB incompatibility or a clash with another plugin, we need to look at the exact error. Please have a look 🙂 * [jdewit](https://wordpress.org/support/users/jdewit/) * (@jdewit) * [8 years, 11 months ago](https://wordpress.org/support/topic/no-valid-header-14/#post-9205895) * Thank you for the plugin! * I got the same error when I tried to install it. There is a trunk folder in the zip. When I deleted it I was able to activate the plugin. * Thread Starter [pecktron2000](https://wordpress.org/support/users/pecktron2000/) * (@pecktron2000) * [8 years, 11 months ago](https://wordpress.org/support/topic/no-valid-header-14/#post-9206184) * I installed an earlier version (4.0 I think) and it worked without the error. * [customle](https://wordpress.org/support/users/customle/) * (@customle) * [8 years, 11 months ago](https://wordpress.org/support/topic/no-valid-header-14/#post-9207129) * Same here, version 4.0 worked fine. * Plugin Author [Jordy Meow](https://wordpress.org/support/users/tigroumeow/) * (@tigroumeow) * [8 years, 11 months ago](https://wordpress.org/support/topic/no-valid-header-14/#post-9207349) * That would be awesome if one of you could have a look at the PHP Error Logs. The current version of the plugin doesn’t show any error on 5 different installs of mine and no other users reported bug. So there is something you have in common, and it’s definitely the same error, but somebody really needs to have a look at the PHP Error Logs. * Thread Starter [pecktron2000](https://wordpress.org/support/users/pecktron2000/) * (@pecktron2000) * [8 years, 11 months ago](https://wordpress.org/support/topic/no-valid-header-14/#post-9207531) * I will check the PHP error logs tomorrow and report what I find. * [jdewit](https://wordpress.org/support/users/jdewit/) * (@jdewit) * [8 years, 11 months ago](https://wordpress.org/support/topic/no-valid-header-14/#post-9209578) * Jordy, I already told you. There is a trunk folder in the latest version. Download the zip file. You’re not going to find anything in the log files. * Plugin Author [Jordy Meow](https://wordpress.org/support/users/tigroumeow/) * (@tigroumeow) * [8 years, 11 months ago](https://wordpress.org/support/topic/no-valid-header-14/#post-9211168) * This trunk folder has nothing to do here… The packing process of WordPress.org repo was acting weird these last few weeks so that might be because of that, not sure. I push a new version, just as usual, and I have checked, this time there is no trunk. Please update 🙂 Viewing 11 replies - 1 through 11 (of 11 total) The topic ‘No Valid Header’ is closed to new replies. * ![](https://ps.w.org/media-cleaner/assets/icon-256x256.png?rev=2791576) * [Media Cleaner: Clean your WordPress!](https://wordpress.org/plugins/media-cleaner/) * [Support Threads](https://wordpress.org/support/plugin/media-cleaner/) * [Active Topics](https://wordpress.org/support/plugin/media-cleaner/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/media-cleaner/unresolved/) * [Reviews](https://wordpress.org/support/plugin/media-cleaner/reviews/) * 11 replies * 5 participants * Last reply from: [Jordy Meow](https://wordpress.org/support/users/tigroumeow/) * Last activity: [8 years, 11 months ago](https://wordpress.org/support/topic/no-valid-header-14/#post-9211168) * Status: resolved