Title: Jetpack connection problem / code 400? Last modified: May 23, 2019 --- # Jetpack connection problem / code 400? * Resolved [mikroprzygoda](https://wordpress.org/support/users/mikroprzygoda/) * (@mikroprzygoda) * [7 years ago](https://wordpress.org/support/topic/jetpack-connection-problem-code-400/) * Hi, * It’s mine first post on the forum well hello everybody! I’m using WordPress on my site mikroprzygoda.com I really like Jetpack visual and editor plus I would like to use WordPress iOS App but I have stable problem with access to my blog. * iOS App usually cannot refresh posts and show information: “transport error – HTTP status code was not 200 (400) [-32300]” but Stats are visible and refreshable. On the desktop version, usually I can do almost everything via the wordpress. com like creating new post and saved but when I try to edit some older draft/ post then platform inform me it cannot be found. I have to back to classic wp- admin and there change the same thing. It’s a bit annoying. * Here we have replies from Jetpack Debuggers: [http://mikroprzygoda.com/wp-admin/admin.php?page=jetpack-debugger](http://mikroprzygoda.com/wp-admin/admin.php?page=jetpack-debugger)– Mikroprzygoda is not connected: 200 * [https://jetpack.com/support/debug/](https://jetpack.com/support/debug/) – 1st try: Could not fetch your site data – 2nd try: XML-RPC is not responding correctly( 400 ) – but [http://mikroprzygoda.com/xmlrpc.php](http://mikroprzygoda.com/xmlrpc.php) looks fine and give classic reply: XML-RPC server accepts POST requests only. * I have no idea currently which way should I go. Can I ask you to find any solution of these issues? * Thanks in advance * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fjetpack-connection-problem-code-400%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 14 replies - 1 through 14 (of 14 total) * Plugin Contributor [James Huff](https://wordpress.org/support/users/macmanx/) * (@macmanx) * [7 years ago](https://wordpress.org/support/topic/jetpack-connection-problem-code-400/#post-11566475) * Please try deleting Jetpack specifically from the Plugins section of your blog’s Dashboard: [https://jetpack.com/support/reconnecting-reinstalling-jetpack/#reinstalling-jetpack](https://jetpack.com/support/reconnecting-reinstalling-jetpack/#reinstalling-jetpack) * This will clear out Jetpack’s settings, and it should work properly after a reinstall. * Thread Starter [mikroprzygoda](https://wordpress.org/support/users/mikroprzygoda/) * (@mikroprzygoda) * [7 years ago](https://wordpress.org/support/topic/jetpack-connection-problem-code-400/#post-11573444) * Hi James, * Thanks for reply and sorry for late feedback. Tried but still it’s not better. iOS App still shows error code 200 (400) [32300] and opening posts via desktop version gives error: “Invalid Post Address: This post cannot be found. Check the web address or start a new post.” Wp-admin/debugger also shows error code 200. * May you have any other ideas? Thanks! * Plugin Support [KokkieH](https://wordpress.org/support/users/kokkieh/) * (@kokkieh) * [7 years ago](https://wordpress.org/support/topic/jetpack-connection-problem-code-400/#post-11574998) * The Jetpack debugger at [https://jetpack.com/support/debug/?url=http%3A%2F%2Fmikroprzygoda.com%2F](https://jetpack.com/support/debug/?url=http%3A%2F%2Fmikroprzygoda.com%2F) still shows a 400 error for me. That means something is blocking XML-RPC at some level, even though the file loads fine in a browser. * Please try the further troubleshooting steps on [this page](https://jetpack.com/support/getting-started-with-jetpack/fixing-jetpack-connection-issues/), specifically in terms of testing for theme or plugin conflicts. Also check that you aren’t using one of the plugins that are known to cause issues on [this page](https://jetpack.com/support/getting-started-with-jetpack/known-issues/). * Thread Starter [mikroprzygoda](https://wordpress.org/support/users/mikroprzygoda/) * (@mikroprzygoda) * [6 years, 11 months ago](https://wordpress.org/support/topic/jetpack-connection-problem-code-400/#post-11631672) * Hello KokkieH, * Just found time to check each point. Unfortunately nothing work. 1. I switched off all plugins except Jetpack 2. I switched theme to Twenty Eleven 3. Reconnecting Jetpack tool Nothing works. * I also do not use any of mentioned issue plugins. But I see some error in plugin section with advanced-cache.php: “Request define(‘WP_CACHE’, true); in file wp- config.php”. Unfortunately, I tried to add this line “define(‘WP_CACHE’, true);” into wp-config.php but there was no change after uploading file to FTP with this line. * Waiting for other ideas and thanks in advance for help, * Plugin Contributor [James Huff](https://wordpress.org/support/users/macmanx/) * (@macmanx) * [6 years, 11 months ago](https://wordpress.org/support/topic/jetpack-connection-problem-code-400/#post-11631694) * What caching plugin are you using? * Thread Starter [mikroprzygoda](https://wordpress.org/support/users/mikroprzygoda/) * (@mikroprzygoda) * [6 years, 11 months ago](https://wordpress.org/support/topic/jetpack-connection-problem-code-400/#post-11632000) * thanks for fast reply. I was wondering on that but have no idea which plugin can be “caching” one. List of used: – Ajax Search Lite – Autoptimize – BBSpoiler– Google XML Sitemaps – Instagram Feed – Jetpack – Classic editor – Page scroll to id – PayPal Donation – Random post widget – Redirect URL to post – Smush – Ultimate WP Query Search Filter – WP-Optimize – Youtube - This reply was modified 6 years, 11 months ago by [mikroprzygoda](https://wordpress.org/support/users/mikroprzygoda/). * Plugin Contributor [James Huff](https://wordpress.org/support/users/macmanx/) * (@macmanx) * [6 years, 11 months ago](https://wordpress.org/support/topic/jetpack-connection-problem-code-400/#post-11632352) * It looks like Autopimize. * I recommend checking with their support for the proper way to fully uninstall their cache, that way we can try connecting without the middleman basically. * Thread Starter [mikroprzygoda](https://wordpress.org/support/users/mikroprzygoda/) * (@mikroprzygoda) * [6 years, 11 months ago](https://wordpress.org/support/topic/jetpack-connection-problem-code-400/#post-11636172) * Hi, * Autoptimize deactivate, unistalled. Checked in plugins folder, there is no files already, no tables in database also (not visible in WP-Optimize). It didn’t help. But when I move out this advanced-cache.php file, this mentioned error is not visible already. Few times deactivate, unistall and install once again Jetpack plugin. No profits. * [http://mikroprzygoda.com/wp-admin/admin.php?page=jetpack-debugger](http://mikroprzygoda.com/wp-admin/admin.php?page=jetpack-debugger) shows site is not connected, code 200 [https://jetpack.com/support/debug/?url=http%3A%2F%2Fmikroprzygoda.com%2F](https://jetpack.com/support/debug/?url=http%3A%2F%2Fmikroprzygoda.com%2F) shows problem with XML-RPC code 400 [http://mikroprzygoda.com/xmlrpc.php](http://mikroprzygoda.com/xmlrpc.php) shows “XML-RPC server accepts POST requests only.” * Just wondering… I do not have HTTPS/SSL, can it have any impact on that? * [Optimizing Matters](https://wordpress.org/support/users/optimizingmatters/) * (@optimizingmatters) * [6 years, 11 months ago](https://wordpress.org/support/topic/jetpack-connection-problem-code-400/#post-11636795) * Autoptimize does not do page (or database or object) caching and does not optimize the backend (wp-admin) or XML-RPC or REST-api, so the chance of AO being involved here is minimal at most .. 😉 * frank (ao dev) * Plugin Contributor [James Huff](https://wordpress.org/support/users/macmanx/) * (@macmanx) * [6 years, 11 months ago](https://wordpress.org/support/topic/jetpack-connection-problem-code-400/#post-11639513) * Ok, we’ll need to take a closer look, so please contact us via [https://jetpack.com/contact-support/?rel=support](https://jetpack.com/contact-support/?rel=support) * [mthupp](https://wordpress.org/support/users/mthupp/) * (@mthupp) * [6 years, 11 months ago](https://wordpress.org/support/topic/jetpack-connection-problem-code-400/#post-11658130) * Yesterday I tried to update my Jetpack plugin on my self-hosted site from 7.4 to 7.4.1. All previous updates of Jetpack have worked fine. But this time I get the following message: * “An error occurred while updating Jetpack by WordPress.com: Could not copy file. jetpack/_inc/lib/class.media.php” * How do I resolve this error? * Thanks. * Plugin Support [Velda](https://wordpress.org/support/users/supernovia/) * (@supernovia) * [6 years, 11 months ago](https://wordpress.org/support/topic/jetpack-connection-problem-code-400/#post-11658283) * Hi [@mthupp](https://wordpress.org/support/users/mthupp/), since this is a different issue from the one in the original post, could you start a new topic? * That way the people who have been working on this topic won’t get unwanted notifications as we troubleshoot your issue. Please include a link to your site as well so we can check on it from our end. Thanks in advance! * [mthupp](https://wordpress.org/support/users/mthupp/) * (@mthupp) * [6 years, 11 months ago](https://wordpress.org/support/topic/jetpack-connection-problem-code-400/#post-11658680) * My apologies. I looked for a way to start a new thread, and frankly, I couldn’t find it. (My first time on the forum). I’ll look again. * Thread Starter [mikroprzygoda](https://wordpress.org/support/users/mikroprzygoda/) * (@mikroprzygoda) * [6 years, 11 months ago](https://wordpress.org/support/topic/jetpack-connection-problem-code-400/#post-11669455) * Hi * I have no idea what was changed but last week I was on holiday and Jetpack seems to work well. I see that Jetpack Debugger still shows problem with code 400 ( access to XML-RPC) but it doesn’t have any impact for that. * I can refresh, open posts in iOS WordPress App without error codes, I can open posts in desktop Jetpack. * Many thanks for your ideas, maybe some of this step started work! Tks! Viewing 14 replies - 1 through 14 (of 14 total) The topic ‘Jetpack connection problem / code 400?’ is closed to new replies. * ![](https://ps.w.org/jetpack/assets/icon.svg?rev=2819237) * [Jetpack - WP Security, Backup, Speed, & Growth](https://wordpress.org/plugins/jetpack/) * [Frequently Asked Questions](https://wordpress.org/plugins/jetpack/#faq) * [Support Threads](https://wordpress.org/support/plugin/jetpack/) * [Active Topics](https://wordpress.org/support/plugin/jetpack/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/jetpack/unresolved/) * [Reviews](https://wordpress.org/support/plugin/jetpack/reviews/) ## Tags * [code 200](https://wordpress.org/support/topic-tag/code-200/) * 14 replies * 6 participants * Last reply from: [mikroprzygoda](https://wordpress.org/support/users/mikroprzygoda/) * Last activity: [6 years, 11 months ago](https://wordpress.org/support/topic/jetpack-connection-problem-code-400/#post-11669455) * Status: resolved