# WIP: Undefined property warning in bricks builder **URL:** \ **Category:** Bugs\ **Tags:** v2-0-1\ **Created:** [August 13, 2025, 8:31pm UTC](https://forum.bricksbuilder.io/t/wip-undefined-property-warning-in-bricks-builder/34815 "2025-08-13T20:31:35Z")\ **Posts on this page:** 14\ **Page:** 1
**Author:** ![squarestar](https://forum.bricksbuilder.io/letter_avatar_proxy/v4/letter/s/c68b51/32.png) [@squarestar](https://forum.bricksbuilder.io/u/squarestar)\ **Post date:** [August 13, 2025, 8:31pm UTC](https://forum.bricksbuilder.io/t/wip-undefined-property-warning-in-bricks-builder/34815/1 "2025-08-13T20:31:35Z")
Browser: FireFox dev edition 142.0b9 OS: Windows 10 URL: [http://localhost:8883/?page\_id=2&bricks=run](http://localhost:8883/?page_id=2&bricks=run) ![image](https://forum.bricksbuilder.io/uploads/default/original/3X/a/a/aac906fe487a19eb6dee135ce87c6fc528a738ab.png) I’m getting the following error in the builder: `Undefined property: stdClass::$meta_key in /var/www/html/wp-includes/class-wp-list-util.php on line 168`. It’s a local site running in Studio ([WordPress Studio Docs - Free Local Development Tool](https://developer.wordpress.com/docs/developer-tools/studio/)), which does not have an SSL cert installed. It does not seem to be the same as the other recently reported bugs related to `class-wp-list-util.php` as it is not from the same line number and relates to a class property, not an array key. Notably, `WP_DEBUG` is set to `false`. However if I set it to `true` but set `WP_DEBUG_DISPLAY` to `false`, the error is not displayed. The content of `debug.log` is: ```auto [13-Aug-2025 20:27:14 UTC] PHP Warning: Undefined property: stdClass::$meta_key in /var/www/html/wp-includes/class-wp-list-util.php on line 168 [13-Aug-2025 20:27:14 UTC] PHP Deprecated: substr(): Passing null to parameter #1 ($string) of type string is deprecated in /var/www/html/wp-content/themes/bricks/includes/integrations/dynamic-data/providers/provider-wp.php on line 500 [13-Aug-2025 20:27:14 UTC] PHP Deprecated: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /var/www/html/wp-content/themes/bricks/includes/integrations/dynamic-data/providers/provider-wp.php on line 365 [13-Aug-2025 20:27:16 UTC] PHP Warning: Undefined property: stdClass::$meta_key in /var/www/html/wp-includes/class-wp-list-util.php on line 168 [13-Aug-2025 20:27:16 UTC] PHP Deprecated: substr(): Passing null to parameter #1 ($string) of type string is deprecated in /var/www/html/wp-content/themes/bricks/includes/integrations/dynamic-data/providers/provider-wp.php on line 500 [13-Aug-2025 20:27:16 UTC] PHP Deprecated: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated in /var/www/html/wp-content/themes/bricks/includes/integrations/dynamic-data/providers/provider-wp.php on line 365 ``` ---
**Author:** ![Matej](https://forum.bricksbuilder.io/user_avatar/forum.bricksbuilder.io/matej/32/20184_2.png) [@Matej](https://forum.bricksbuilder.io/u/Matej)\ **Post date:** [August 14, 2025, 7:03am UTC](https://forum.bricksbuilder.io/t/wip-undefined-property-warning-in-bricks-builder/34815/2 "2025-08-14T07:03:11Z")
Hi @squarestar, can you test by disabling **all** plugins and custom scripts? Only keep Bricks active. Please let me know if it’s still happening. If it’s not, please enable plugin by plugin, so that we narrow down what it could be. Thank you, Matej ---
**Author:** ![squarestar](https://forum.bricksbuilder.io/letter_avatar_proxy/v4/letter/s/c68b51/32.png) [@squarestar](https://forum.bricksbuilder.io/u/squarestar)\ **Post date:** [August 14, 2025, 9:37am UTC](https://forum.bricksbuilder.io/t/wip-undefined-property-warning-in-bricks-builder/34815/3 "2025-08-14T09:37:16Z")
The issue occurred in a fresh site with any default plugins removed and no custom scripts. ---
**Author:** ![Matej](https://forum.bricksbuilder.io/user_avatar/forum.bricksbuilder.io/matej/32/20184_2.png) [@Matej](https://forum.bricksbuilder.io/u/Matej)\ **Post date:** [August 15, 2025, 8:41am UTC](https://forum.bricksbuilder.io/t/wip-undefined-property-warning-in-bricks-builder/34815/4 "2025-08-15T08:41:38Z")
I see. Do you always use WordPress Studio for local development? Have you tried any other local dev environments and you were able to replicate it there as well? If not, I’ll try with WordPress Studio (I have to install it, never worked in it), but please let me know what I need to do to replicate this. Only install Bricks and open the editor? Thank you, Matej ---
**Author:** ![squarestar](https://forum.bricksbuilder.io/letter_avatar_proxy/v4/letter/s/c68b51/32.png) [@squarestar](https://forum.bricksbuilder.io/u/squarestar)\ **Post date:** [August 15, 2025, 10:36am UTC](https://forum.bricksbuilder.io/t/wip-undefined-property-warning-in-bricks-builder/34815/5 "2025-08-15T10:36:07Z")
Thanks Matej. I started using Studio recently so I don’t have many experiences to compare with. I do have a local WAMP set up and when I loaded the site through that I did not see the error, so it seems specific to Studio. If you are going to test in Studio yourself, to replicate it you just need Bricks installed and go to edit a page. I can send you my settings config if you like. ---
**Author:** ![Matej](https://forum.bricksbuilder.io/user_avatar/forum.bricksbuilder.io/matej/32/20184_2.png) [@Matej](https://forum.bricksbuilder.io/u/Matej)\ **Post date:** [August 18, 2025, 6:01am UTC](https://forum.bricksbuilder.io/t/wip-undefined-property-warning-in-bricks-builder/34815/6 "2025-08-18T06:01:48Z")
Hi @squarestar, thank you so much. I’ve installed WordPress Studio on my local computer, and I was able to replicate the issue just by installing Bricks. I’ve created an internal task for this. I usually use [LocalWP](https://localwp.com/) or [Laragon](https://laragon.org/) for local work, and issues like this do not exist there. Especially LocalWP is simple as well. 🙂 Best regards, Matej ---
**Author:** ![Bendd](https://forum.bricksbuilder.io/letter_avatar_proxy/v4/letter/b/ec9cab/32.png) [@Bendd](https://forum.bricksbuilder.io/u/Bendd)\ **Post date:** [August 22, 2025, 6:04am UTC](https://forum.bricksbuilder.io/t/wip-undefined-property-warning-in-bricks-builder/34815/7 "2025-08-22T06:04:28Z")
Hi @Matej, I jump in to say that I had the same issue using WordPress Studio. After having the same issue on Studio, I tested on a free staging site directly on [WordPress.com](http://WordPress.com) to see if it was related to all products of automattic and I had issues as well using bricks (when I created a new page and clicked on “edit with bricks” I arrived on a blank page and was stuck on that blank page). After that I tested on a staging and production environment on pressable (other automattic hosting service) and there, everything went fine. I also used local WP, devkinsta and other local docker wp environments and never had a problem. Don’t know if it helps but I thought it was worth noticing it! Thank you and have a great day! Ben ---
**Author:** ![Matej](https://forum.bricksbuilder.io/user_avatar/forum.bricksbuilder.io/matej/32/20184_2.png) [@Matej](https://forum.bricksbuilder.io/u/Matej)\ **Post date:** [August 22, 2025, 6:10am UTC](https://forum.bricksbuilder.io/t/wip-undefined-property-warning-in-bricks-builder/34815/8 "2025-08-22T06:10:40Z")
Hi @Bendd and welcome to the community! Thank you for your report and tests. Yep, there is something with WP Studio that triggers those errors, and we will investigate what it is. For now, I suggest that you (or anybody else) use some other development environment, like Local WP, DevKinsta, or others, that will not cause this issue. Thank you for understanding, Matej ---
**Author:** ![squarestar](https://forum.bricksbuilder.io/letter_avatar_proxy/v4/letter/s/c68b51/32.png) [@squarestar](https://forum.bricksbuilder.io/u/squarestar)\ **Post date:** [August 22, 2025, 6:51am UTC](https://forum.bricksbuilder.io/t/wip-undefined-property-warning-in-bricks-builder/34815/9 "2025-08-22T06:51:28Z")
Thanks Matej. Just a reminder for anyone that really wants to use Studio, for whatever reason - you can set `WP_DEBUG = true` and set `WP_DEBUG_DISPLAY = false` to fix the error display in Studio. ---
**Author:** ![Matej](https://forum.bricksbuilder.io/user_avatar/forum.bricksbuilder.io/matej/32/20184_2.png) [@Matej](https://forum.bricksbuilder.io/u/Matej)\ **Post date:** [August 22, 2025, 7:37am UTC](https://forum.bricksbuilder.io/t/wip-undefined-property-warning-in-bricks-builder/34815/10 "2025-08-22T07:37:58Z")
> [@squarestar](#): > > you can set `WP_DEBUG = true` and set `WP_DEBUG_DISPLAY = false` to fix the error display in Studio. Yep, that’s also a workaround, but it’s important to note that this will hide the error (not display it), but it will still be there. ---
**Author:** ![smaese](https://forum.bricksbuilder.io/user_avatar/forum.bricksbuilder.io/smaese/32/32129_2.png) [@smaese](https://forum.bricksbuilder.io/u/smaese)\ **Post date:** [February 23, 2026, 5:51am UTC](https://forum.bricksbuilder.io/t/wip-undefined-property-warning-in-bricks-builder/34815/11 "2026-02-23T05:51:27Z")
Was there any progress on this issue? I installed Bricks on a WordPress Studio site, got the same error, and Google led me here. ---
**Author:** ![Matej](https://forum.bricksbuilder.io/user_avatar/forum.bricksbuilder.io/matej/32/20184_2.png) [@Matej](https://forum.bricksbuilder.io/u/Matej)\ **Post date:** [February 23, 2026, 7:29am UTC](https://forum.bricksbuilder.io/t/wip-undefined-property-warning-in-bricks-builder/34815/12 "2026-02-23T07:29:19Z")
Not yet. Task is still WIP (= Work In Progress) Matej ---
**Author:** ![UniqueUsername](https://forum.bricksbuilder.io/user_avatar/forum.bricksbuilder.io/uniqueusername/32/20090_2.png) [@UniqueUsername](https://forum.bricksbuilder.io/u/UniqueUsername)\ **Post date:** [March 17, 2026, 5:35am UTC](https://forum.bricksbuilder.io/t/wip-undefined-property-warning-in-bricks-builder/34815/13 "2026-03-17T05:35:24Z")
This is also happening for me while attempting to use a newly created WP site on studio. I really hope you can figure out what is causing this. I have grown to like studio and would like to use it but this makes it very difficult. ---
**Author:** ![Mykyta](https://forum.bricksbuilder.io/letter_avatar_proxy/v4/letter/m/7cd45c/32.png) [@Mykyta](https://forum.bricksbuilder.io/u/Mykyta)\ **Post date:** [May 28, 2026, 12:44pm UTC](https://forum.bricksbuilder.io/t/wip-undefined-property-warning-in-bricks-builder/34815/14 "2026-05-28T12:44:43Z")
This issue needs more attention!