Title: Unknown error Last modified: August 21, 2016 --- # Unknown error * Resolved [Mr Bean](https://wordpress.org/support/users/mr-bean-1/) * (@mr-bean-1) * [12 years, 4 months ago](https://wordpress.org/support/topic/unknown-error-7/) * Since today I noticed a problem on my site using the eventlist widget: * on my site the plugin gives me this error: * Please visit widget admin page and press “Save” to perform the required widget updates (required due to changes in new plugin version) ! * In the backend it’s fine till I want to save a new event. Then it gives me this error * Warning: Cannot modify header information – headers already sent by (output started at (website)/wp-admin/includes/template.php:1698) in (website)/public_html/oo/ wp-includes/pluggable.php on line 896 * I already tried reinstalling but that didn’t work. Can you help me? * [http://wordpress.org/plugins/event-list/](http://wordpress.org/plugins/event-list/) Viewing 15 replies - 1 through 15 (of 16 total) 1 [2](https://wordpress.org/support/topic/unknown-error-7/page/2/?output_format=md) [→](https://wordpress.org/support/topic/unknown-error-7/page/2/?output_format=md) * Plugin Author [mibuthu](https://wordpress.org/support/users/mibuthu/) * (@mibuthu) * [12 years, 4 months ago](https://wordpress.org/support/topic/unknown-error-7/#post-4461023) * The widget part is normal. Please proceed with the steps given: Goto the admin page Appearance -> Widgets, choose the event-list widget and press save. Afterwards it should be working again. * The problem on the admin page I already mentioned. It seems to be a problem when using permalinks. I’m already working on it and hope I can release a fix soon. * Thread Starter [Mr Bean](https://wordpress.org/support/users/mr-bean-1/) * (@mr-bean-1) * [12 years, 4 months ago](https://wordpress.org/support/topic/unknown-error-7/#post-4461033) * Thank you very much, I’am right before a deadline * Plugin Author [mibuthu](https://wordpress.org/support/users/mibuthu/) * (@mibuthu) * [12 years, 4 months ago](https://wordpress.org/support/topic/unknown-error-7/#post-4461073) * I have fix this issue now in the development version. Can you please try it with [this](https://github.com/mibuthu/wp-event-list/commit/565a3bfefcad6f041cd7ce6f95940bdae4ef8935) modifications in your installation? Would be good to know, if this also solve your problems. * I will release an updated version tomorrow. * Thread Starter [Mr Bean](https://wordpress.org/support/users/mr-bean-1/) * (@mr-bean-1) * [12 years, 4 months ago](https://wordpress.org/support/topic/unknown-error-7/#post-4461103) * I said Victorie to soon. 🙁 The widget shows it content but I can’t change anything or I get thit error again * Warning: Cannot modify header information – headers already sent by (output started at (website)/wp-admin/includes/template.php:1698) in (website)/public_html/oo/ wp-includes/pluggable.php on line 896 * Succes with the oncomming update! * Thread Starter [Mr Bean](https://wordpress.org/support/users/mr-bean-1/) * (@mr-bean-1) * [12 years, 4 months ago](https://wordpress.org/support/topic/unknown-error-7/#post-4461115) * I think I’ve found something valuable; when I add a event the default date for today is “3 januari 2014” when I change this to “3 January 2014” is works. I tested this on the downgraded version 0.56 * Plugin Author [mibuthu](https://wordpress.org/support/users/mibuthu/) * (@mibuthu) * [12 years, 4 months ago](https://wordpress.org/support/topic/unknown-error-7/#post-4461146) * I have release a new version with some fixes now (0.6.1). This should fix the“ Cannot modify header information” bug. * I will have a look at the date issue, you last info is a great help. Did I understand it correctly that you also have this problem in the old version 0.5.6? You can also have a look at [this thread](http://wordpress.org/support/topic/can-only-post-events-for-today?replies=12), but I think your problem is different. * [HdG](https://wordpress.org/support/users/hansdegoede/) * (@hansdegoede) * [12 years, 4 months ago](https://wordpress.org/support/topic/unknown-error-7/#post-4461148) * Is this the same problem? * When I modify an event the next error occurs: Error: Event “Test” (id: 11) could not be modified. Only when I change the start-date, the event is modified with no error. I tried to change the WordPress date format, but that has no effect. * [HdG](https://wordpress.org/support/users/hansdegoede/) * (@hansdegoede) * [12 years, 4 months ago](https://wordpress.org/support/topic/unknown-error-7/#post-4461152) * Sorry, 0.6.1 does not solve my problem. The only way I can change an event, is to change the start date of the event. * Plugin Author [mibuthu](https://wordpress.org/support/users/mibuthu/) * (@mibuthu) * [12 years, 4 months ago](https://wordpress.org/support/topic/unknown-error-7/#post-4461191) * There are no date fixes in 0.6.1. I will do more testing and hopefully find some fixes for the next versions 0.6.2 or 0.6.3. * [HdG](https://wordpress.org/support/users/hansdegoede/) * (@hansdegoede) * [12 years, 3 months ago](https://wordpress.org/support/topic/unknown-error-7/#post-4461202) * I wonder whether a solution is found already. I can’t explain to users why they should change the date twice when they modify the text of an event. I hope for a fast solution. * Plugin Author [mibuthu](https://wordpress.org/support/users/mibuthu/) * (@mibuthu) * [12 years, 3 months ago](https://wordpress.org/support/topic/unknown-error-7/#post-4461203) * In the next version I will include an option to allow specifying a manual date format for the event form. This should allow easier testing and should also make it possible to specify a standard format to make it working until I find a solution. Probably I can already identify the problem. I hope I can release the new version next weekend. * [HdG](https://wordpress.org/support/users/hansdegoede/) * (@hansdegoede) * [12 years, 3 months ago](https://wordpress.org/support/topic/unknown-error-7/#post-4461204) * Thank you mibuthu, I look forward to it. * Plugin Author [mibuthu](https://wordpress.org/support/users/mibuthu/) * (@mibuthu) * [12 years, 3 months ago](https://wordpress.org/support/topic/unknown-error-7/#post-4461217) * I have done a complete rewrite of the date handling in the new version 0.6.2. All date issues should be fixed now. * [HdG](https://wordpress.org/support/users/hansdegoede/) * (@hansdegoede) * [12 years, 3 months ago](https://wordpress.org/support/topic/unknown-error-7/#post-4461218) * Good news! I tested it on my test-site and the problem is gone. I just installed it at the production-site and asked the users to test it. Thanks for this fix! * [bagendahl](https://wordpress.org/support/users/bagendahl/) * (@bagendahl) * [12 years, 2 months ago](https://wordpress.org/support/topic/unknown-error-7/#post-4461225) * I have WP and plugins updated to latest version but I can’t get your plugin to work. When I try to add a new event I got follow message: Error: New Event “test” could not be added. When I try to update an old event I got follow message: Error: Event “Testing” (id: 6) could not be modified. Date format is set to “ Y-m-d” but I have also tried “Y/m/d” without any luck. I also tried to reinstalled plugin but that didn’t help. Please help me. Viewing 15 replies - 1 through 15 (of 16 total) 1 [2](https://wordpress.org/support/topic/unknown-error-7/page/2/?output_format=md) [→](https://wordpress.org/support/topic/unknown-error-7/page/2/?output_format=md) The topic ‘Unknown error’ is closed to new replies. * ![](https://s.w.org/plugins/geopattern-icon/event-list_f8f8f8.svg) * [Event List](https://wordpress.org/plugins/event-list/) * [Frequently Asked Questions](https://wordpress.org/plugins/event-list/#faq) * [Support Threads](https://wordpress.org/support/plugin/event-list/) * [Active Topics](https://wordpress.org/support/plugin/event-list/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/event-list/unresolved/) * [Reviews](https://wordpress.org/support/plugin/event-list/reviews/) * 16 replies * 4 participants * Last reply from: [mibuthu](https://wordpress.org/support/users/mibuthu/) * Last activity: [12 years, 2 months ago](https://wordpress.org/support/topic/unknown-error-7/page/2/#post-4461227) * Status: resolved