Title: Posts block, preview error Last modified: December 5, 2020 --- # Posts block, preview error * Resolved [philw123](https://wordpress.org/support/users/philw123/) * (@philw123) * [5 years, 6 months ago](https://wordpress.org/support/topic/posts-block-preview-error/) * Hi there, * I’ve encountered a potential bug with the posts block in Otter. I can’t provide a link to the page as we are in pre-production and not live. * If I include more than one posts block on a single page, the block editor only renders the first posts block, subsequent posts blocks display te error _This block has encountered an error and cannot be previewed._ * The page previews and publishes without error. * I’m no WordPress expert, but I’ve included the console output below: * `react-dom.min.js?ver=16.9.0:103 TypeError: Cannot read property ‘name’ of undefined at blocks.js?ver=1.5.10:1 at Array.map () at Z (blocks.js?ver=1.5.10: 1) at je (react-dom.min.js?ver=16.9.0:78) at ph (react-dom.min.js?ver=16.9.0: 215) at lh (react-dom.min.js?ver=16.9.0:126) at O (react-dom.min.js?ver=16.9.0: 121) at ze (react-dom.min.js?ver=16.9.0:118) at react-dom.min.js?ver=16.9.0:53 at unstable_runWithPriority (react.min.js?ver=16.9.0:26) * [DOM] Found 2 elements with non-unique id #_wpnonce: (More info: [https://goo.gl/9p2vKq](https://goo.gl/9p2vKq)) ​< input type=”hidden” id=”_wpnonce” name=”_wpnonce” value=”3135642fab”> Viewing 7 replies - 1 through 7 (of 7 total) * Plugin Author [Hardeep Asrani](https://wordpress.org/support/users/hardeepasrani/) * (@hardeepasrani) * [5 years, 6 months ago](https://wordpress.org/support/topic/posts-block-preview-error/#post-13753013) * Hey [@philw123](https://wordpress.org/support/users/philw123/), * We tried on our end and it worked just fine. Can you let us know which plugins and theme are active in your website so we could reproduce with them too? * thank you! * Thread Starter [philw123](https://wordpress.org/support/users/philw123/) * (@philw123) * [5 years, 6 months ago](https://wordpress.org/support/topic/posts-block-preview-error/#post-13753547) * Hi Hardeep, thanks for the quick response. I’m running a Neve child theme with no modifications. I have tried temporarily switching back to the Neve theme but that didn’t fix it. * Below is a list of installed plugins. I have also deactivated them all at the same time (except Otter blocks) but that did not change the outcome. I’m going to take a copy of the site and start deleting stuff and see what happens. * [https://en-gb.wordpress.org/plugins/add-to-any/](https://en-gb.wordpress.org/plugins/add-to-any/) [https://en-gb.wordpress.org/plugins/advanced-gutenberg-blocks/](https://en-gb.wordpress.org/plugins/advanced-gutenberg-blocks/) [https://en-gb.wordpress.org/plugins/contact-form-7/](https://en-gb.wordpress.org/plugins/contact-form-7/) [https://en-gb.wordpress.org/plugins/free-images/](https://en-gb.wordpress.org/plugins/free-images/) [https://en-gb.wordpress.org/plugins/otter-blocks/](https://en-gb.wordpress.org/plugins/otter-blocks/) [https://en-gb.wordpress.org/plugins/hummingbird-performance/](https://en-gb.wordpress.org/plugins/hummingbird-performance/) [https://en-gb.wordpress.org/plugins/optimole-wp/](https://en-gb.wordpress.org/plugins/optimole-wp/) [https://en-gb.wordpress.org/plugins/mailchimp-for-wp/](https://en-gb.wordpress.org/plugins/mailchimp-for-wp/) [https://en-gb.wordpress.org/plugins/wonderm00ns-simple-facebook-open-graph-tags/](https://en-gb.wordpress.org/plugins/wonderm00ns-simple-facebook-open-graph-tags/) [https://en-gb.wordpress.org/plugins/themeisle-companion/](https://en-gb.wordpress.org/plugins/themeisle-companion/) [https://en-gb.wordpress.org/plugins/password-protected/](https://en-gb.wordpress.org/plugins/password-protected/) [https://en-gb.wordpress.org/plugins/wp-pexels-free-stock-photos/](https://en-gb.wordpress.org/plugins/wp-pexels-free-stock-photos/) [https://en-gb.wordpress.org/plugins/popup-maker/](https://en-gb.wordpress.org/plugins/popup-maker/) [https://en-gb.wordpress.org/plugins/post-thumbnail-editor/](https://en-gb.wordpress.org/plugins/post-thumbnail-editor/) [https://en-gb.wordpress.org/plugins/redirection/](https://en-gb.wordpress.org/plugins/redirection/) [https://en-gb.wordpress.org/plugins/zero-spam/](https://en-gb.wordpress.org/plugins/zero-spam/) [https://en-gb.wordpress.org/plugins/wp-mail-smtp/](https://en-gb.wordpress.org/plugins/wp-mail-smtp/) * Thread Starter [philw123](https://wordpress.org/support/users/philw123/) * (@philw123) * [5 years, 6 months ago](https://wordpress.org/support/topic/posts-block-preview-error/#post-13753608) * Further to my last post I have narrowed down the problem. It only appears to happen if I select the same specific category on all of the posts blocks. If I leave the category setting as ‘All’ the problem does not occur. * Plugin Author [Hardeep Asrani](https://wordpress.org/support/users/hardeepasrani/) * (@hardeepasrani) * [5 years, 6 months ago](https://wordpress.org/support/topic/posts-block-preview-error/#post-13762678) * Hey [@philw123](https://wordpress.org/support/users/philw123/), * We tried to reproduce it and couldn’t do it. If we give you a demo WordPress instance, would you be able to reproduce it for us? Let us know. 🙂 * Thread Starter [philw123](https://wordpress.org/support/users/philw123/) * (@philw123) * [5 years, 5 months ago](https://wordpress.org/support/topic/posts-block-preview-error/#post-13763749) * Happy to give it a go, yes. * Plugin Author [Hardeep Asrani](https://wordpress.org/support/users/hardeepasrani/) * (@hardeepasrani) * [5 years, 5 months ago](https://wordpress.org/support/topic/posts-block-preview-error/#post-13768781) * Great! Can you reach out to us at [friends@themeisle.com](https://wordpress.org/support/topic/posts-block-preview-error/friends@themeisle.com?output_format=md)?– make sure to mention my name in the email with a link to this thread, and notify me here once you’ve sent the email. * I’m not allowed to share any credentials with you for testing on this forum as per WordPress.org forum guidelines so we will have to do that outside the forum. * Thread Starter [philw123](https://wordpress.org/support/users/philw123/) * (@philw123) * [5 years, 5 months ago](https://wordpress.org/support/topic/posts-block-preview-error/#post-13770037) * That’s great Hardeep. I’ve sent an email. I’ll mark this thread as resolved. Viewing 7 replies - 1 through 7 (of 7 total) The topic ‘Posts block, preview error’ is closed to new replies. * ![](https://ps.w.org/otter-blocks/assets/icon-256x256.gif?rev=3452114) * [Otter Blocks - Gutenberg Blocks, Page Builder for Gutenberg Editor & FSE](https://wordpress.org/plugins/otter-blocks/) * [Frequently Asked Questions](https://wordpress.org/plugins/otter-blocks/#faq) * [Support Threads](https://wordpress.org/support/plugin/otter-blocks/) * [Active Topics](https://wordpress.org/support/plugin/otter-blocks/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/otter-blocks/unresolved/) * [Reviews](https://wordpress.org/support/plugin/otter-blocks/reviews/) * 7 replies * 2 participants * Last reply from: [philw123](https://wordpress.org/support/users/philw123/) * Last activity: [5 years, 5 months ago](https://wordpress.org/support/topic/posts-block-preview-error/#post-13770037) * Status: resolved