Title: Undefined error occurred Last modified: August 11, 2020 --- # Undefined error occurred * Resolved [chrisrarendt](https://wordpress.org/support/users/chrisrarendt/) * (@chrisrarendt) * [5 years, 10 months ago](https://wordpress.org/support/topic/undefined-error-occurred/) * The issue can be found here: [https://staging1.ww5.cityofpasadena.net/water-and-power/wp-admin/admin.php?page=metaslider&id=42](https://staging1.ww5.cityofpasadena.net/water-and-power/wp-admin/admin.php?page=metaslider&id=42) The preview works: No It works with other themes: No It works when I disable all other plugins: Haven’t Tried Meta Slider version: 3.16.4 * I can’t save any slideshow anymore, even a new one. It used to work a while ago. I removed all the theme files and it doesn’t work. The preview does load but it doesn’t reflect the content I provided. * Console error: app-3-16-4.min.js?ver=3.16.4:2 MetaSlider (save-error): undefined notifyError @ app-3-16-4.min.js?ver=3.16.4:2 (anonymous) @ app-3-16-4.min.js? ver=3.16.4:2 Promise.catch (async) (anonymous) @ app-3-16-4.min.js?ver=3.16.4: 2 l @ app-3-16-4.min.js?ver=3.16.4:2 (anonymous) @ app-3-16-4.min.js?ver=3.16.4: 2 forEach.t. @ app-3-16-4.min.js?ver=3.16.4:2 pt @ app-3-16-4.min.js? ver=3.16.4:2 a @ app-3-16-4.min.js?ver=3.16.4:2 (anonymous) @ app-3-16-4.min. js?ver=3.16.4:2 (anonymous) @ app-3-16-4.min.js?ver=3.16.4:2 save @ app-3-16- 4.min.js?ver=3.16.4:2 (anonymous) @ app-3-16-4.min.js?ver=3.16.4:2 Ht @ app-3- 16-4.min.js?ver=3.16.4:2 t.$emit @ app-3-16-4.min.js?ver=3.16.4:2 save @ app- 3-16-4.min.js?ver=3.16.4:2 click @ VM1156:3 Ht @ app-3-16-4.min.js?ver=3.16.4: 2 n @ app-3-16-4.min.js?ver=3.16.4:2 * Network tab: save (blocked: mixed-content) * Request URL: [http://staging1.ww5.cityofpasadena.net/water-and-power/wp-json/metaslider/v1/settings/save](http://staging1.ww5.cityofpasadena.net/water-and-power/wp-json/metaslider/v1/settings/save) Referrer Policy: strict-origin-when-cross-origin Provisional headers are shown Accept: application/json, text/plain, */* Content-Type: multipart/form-data; boundary=—-WebKitFormBoundaryeiKWsSShgFyiFvF9 Referer X-Requested-With: XMLHttpRequest X-WP-Nonce: f9ca419026 slideshow_id: 42 action: ms_update_all_settings settings[ type]: flex settings[width]: 1920 settings[height]: 500 settings[effect]: fade settings[navigation]: false settings[center]: on settings[smartCrop]: disabled settings[carouselMargin]: 5 settings[hoverPause]: on settings[delay]: 3000 settings[ animationSpeed]: 600 settings[direction]: horizontal settings[easing]: linear settings[prevText]: < settings[nextText]: > settings[cssClass]: settings[printCss]: on settings[printJs]: on settings[noConflict]: on Viewing 6 replies - 1 through 6 (of 6 total) * [Kevin Batdorf](https://wordpress.org/support/users/kbat82/) * (@kbat82) * [5 years, 10 months ago](https://wordpress.org/support/topic/undefined-error-occurred/#post-13236770) * Hi [@chrisrarendt](https://wordpress.org/support/users/chrisrarendt/) * Unfortunately the error message isn’t very helpful “MetaSlider (save-error): undefined”. Does an error show when you try any other action? For example adding a slide, or searching for slideshows (from the top search bar)? * The slideshow also saves when previewing. Do you see an error during that action as well? * Do you know how to enable debugging in WordPress? A better error message might appear. * Thread Starter [chrisrarendt](https://wordpress.org/support/users/chrisrarendt/) * (@chrisrarendt) * [5 years, 10 months ago](https://wordpress.org/support/topic/undefined-error-occurred/#post-13236841) * I can search. I can not preview by clicking, but I can alt+p to preview. The click doesn’t do anything but the alt+p tries to save, which results in the same error for both the calls to save and preview. * What do you mean about enabling debugging in WordPress? I tried this but it didn’t give any errors for metaslider: * error_reporting(E_ALL); ini_set(‘display_errors’, ‘1’); * There was one error but I think it is unreleated: Notice: Undefined offset: 1 in /home/enter869/staging1/wp-content/plugins/reorder-my-sites/reorder-my-sites. php on line 38 * [Kevin Batdorf](https://wordpress.org/support/users/kbat82/) * (@kbat82) * [5 years, 10 months ago](https://wordpress.org/support/topic/undefined-error-occurred/#post-13236937) * Hi, * Perhaps unrelated but what about if you disable that plugin? Any change? * To enable debugging you need to navigate to the wp-config.php file and look for: * define(‘WP_DEBUG’, false); * Change this to: define(‘WP_DEBUG’, true); * You can try to set it up like this: * ``` define( 'WP_DEBUG', true ); define( 'WP_DEBUG_LOG', true ); define( 'WP_DEBUG_DISPLAY', true ); @ini_set( 'display_errors', 1 ); define( 'SCRIPT_DEBUG', true ); ``` * [StandOutSites](https://wordpress.org/support/users/standoutsites/) * (@standoutsites) * [5 years, 10 months ago](https://wordpress.org/support/topic/undefined-error-occurred/#post-13244675) * Related to this issue. In addition to the error mentioned above. Another error is reported that I believe can help identify the problem in the code. Also, we did disable plugin Reorder My Sites and it didn’t resolve the problem. * `VM1363:1 Mixed Content: The page at 'https://staging1.xxxxxxx.net/water-and- power/wp-admin/admin.php?page=metaslider' was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint 'http://staging1.xxxxxx.net/water-and-power/ wp-json/metaslider/v1/slideshow/single?action=ms_get_single_slideshow&id=7706'. This request has been blocked; the content must be served over HTTPS.` * [Kevin Batdorf](https://wordpress.org/support/users/kbat82/) * (@kbat82) * [5 years, 10 months ago](https://wordpress.org/support/topic/undefined-error-occurred/#post-13244702) * Hi [@standoutsites](https://wordpress.org/support/users/standoutsites/) * That has to do with your WordPress configuration and probably the value of `home_url` in your settings. An SSL plugin might sove that issue for you. * Here’s the function we use to build that URL if you want to take a look under the hood: [https://developer.wordpress.org/reference/functions/get_rest_url/](https://developer.wordpress.org/reference/functions/get_rest_url/) * [Kevin Batdorf](https://wordpress.org/support/users/kbat82/) * (@kbat82) * [5 years, 9 months ago](https://wordpress.org/support/topic/undefined-error-occurred/#post-13332570) * Hi, * I’ll mark this as resolved as we didn’t hear back, but feel free to reply if needed or have any more questions. Viewing 6 replies - 1 through 6 (of 6 total) The topic ‘Undefined error occurred’ is closed to new replies. * ![](https://ps.w.org/ml-slider/assets/icon.svg?rev=3568997) * [Slider, Gallery, and Carousel by MetaSlider - Image Slider, Video Slider](https://wordpress.org/plugins/ml-slider/) * [Frequently Asked Questions](https://wordpress.org/plugins/ml-slider/#faq) * [Support Threads](https://wordpress.org/support/plugin/ml-slider/) * [Active Topics](https://wordpress.org/support/plugin/ml-slider/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/ml-slider/unresolved/) * [Reviews](https://wordpress.org/support/plugin/ml-slider/reviews/) ## Tags * [cant-save](https://wordpress.org/support/topic-tag/cant-save/) * [undefined error](https://wordpress.org/support/topic-tag/undefined-error/) * 6 replies * 3 participants * Last reply from: [Kevin Batdorf](https://wordpress.org/support/users/kbat82/) * Last activity: [5 years, 9 months ago](https://wordpress.org/support/topic/undefined-error-occurred/#post-13332570) * Status: resolved