Title: “HMAC Verification Failed” Last modified: July 14, 2026 --- # “HMAC Verification Failed” * [ChrisMonty](https://wordpress.org/support/users/chrismonty/) * (@chrismonty) * [1 day, 12 hours ago](https://wordpress.org/support/topic/hmac-verification-failed/) * When using the WordPress mobile app for [my site], I can no longer see or edit posts that were written on desktop. I only see posts that were composed using the mobile app. When trying to refresh the page to get posts to reload, I get an error message that states, “Unable to Sync: The Jetpack site is inaccessible or returned an error: HMAC Verification failed. [invalid_hmac]” * iOS app version is 27.0. iPhone 17 Pro running iOS 26.5.2. * I have tried disconnecting Jetpack and reconnecting. I have tried completely logging out of the iOS app and logging back in. Still, the issue persists. I can only see the posts I composed via the iOS app and I’m still getting the error message above. * Help? - This topic was modified 1 day, 12 hours ago by [ChrisMonty](https://wordpress.org/support/users/chrismonty/). - This topic was modified 1 day, 12 hours ago by [Steven Stern (sterndata)](https://wordpress.org/support/users/sterndata/). Reason: moved url * The page I need help with: _[[log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fhmac-verification-failed%2F%3Foutput_format%3Dmd&locale=en_US) to see the link]_ Viewing 4 replies - 1 through 4 (of 4 total) * Thread Starter [ChrisMonty](https://wordpress.org/support/users/chrismonty/) * (@chrismonty) * [1 day, 12 hours ago](https://wordpress.org/support/topic/hmac-verification-failed/#post-18965100) * P.S. – I have also checked with my hosting company. They said everything looks fine in their end and that I should contact WordPress support. * [Jenny (a11n)](https://wordpress.org/support/users/jennywp/) * (@jennywp) * [1 day, 12 hours ago](https://wordpress.org/support/topic/hmac-verification-failed/#post-18965129) * Hey [@chrismonty](https://wordpress.org/support/users/chrismonty/), * Thanks for listing what you’ve already tried, that rules out the most common troubleshooting I’d recommend first. 🙂 * Your site’s Jetpack connection is healthy from our side, so the site isn’t blocking the app. The “HMAC Verification failed [invalid_hmac]” error means the app is still signing its requests with older connection credentials that no longer match the ones your site is using now. That’s why it can load the posts it created locally but not the ones written on desktop. * The disconnect and the app logout you did won’t always clear those stored credentials. The step that frequently resolves this is removing the site from the app and adding it back: 1. In the app, open the site, go to the site’s settings, and remove the site from the app. 2. Force-quit the app (swipe it away from the app switcher), then reopen it. 3. Add the site again so it pulls fresh credentials. * Make sure you’re signing into the app with the same WordPress.com account your site’s Jetpack connection is tied to. If the app is tied to a different account, that can also result in this error. After signing in, you can confirm you’re on the right account by checking that this site shows in your connected sites. * Let us know what you find! * Thread Starter [ChrisMonty](https://wordpress.org/support/users/chrismonty/) * (@chrismonty) * [1 day, 12 hours ago](https://wordpress.org/support/topic/hmac-verification-failed/#post-18965135) * Understood. * Would this be located under Jetpack Settings —> Manage Connections —> Disconnect from WordPress? * Then reconnect? * [Jeff (a11n)](https://wordpress.org/support/users/jmills38/) * (@jmills38) * [1 day, 7 hours ago](https://wordpress.org/support/topic/hmac-verification-failed/#post-18965285) * Hi [@chrismonty](https://wordpress.org/support/users/chrismonty/) * Yes, that’s the right place. In your WP Admin (on the desktop, not the app), go to Jetpack > My Jetpack, click “Site and account connected” near the bottom of the page, and choose Disconnect in the window that appears. * Since you’ve already tried reconnecting once from the app without it sticking, let’s make this a full reset rather than just a reconnect. After you disconnect, deactivate the Jetpack plugin, delete it, then install a fresh copy from Plugins > Add New and reconnect to your WordPress.com account. Doing this in a private/ incognito browser window, and clearing any caching plugin or host cache first, gives it the best chance of holding. Full steps here: [https://jetpack.com/support/reconnecting-reinstalling-jetpack/](https://jetpack.com/support/reconnecting-reinstalling-jetpack/) * The detail you mentioned, where the app shows only the posts you wrote in the app and not the ones from desktop, is a helpful clue. It points to the app and the site getting their wires crossed on the connection, which the clean reinstall above is aimed at sorting out. Once it reconnects, give the app a refresh and your desktop posts should come back into view. * If the error returns after that, reply here and let me know, and we’ll take a closer look at the connection from our side. Viewing 4 replies - 1 through 4 (of 4 total) You must be [logged in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fwordpress.org%2Fsupport%2Ftopic%2Fhmac-verification-failed%2F%3Foutput_format%3Dmd&locale=en_US) to reply to this topic. ## Tags * [app](https://wordpress.org/support/topic-tag/app/) * [ios](https://wordpress.org/support/topic-tag/ios/) * [mobile](https://wordpress.org/support/topic-tag/mobile/) * [WordPress](https://wordpress.org/support/topic-tag/wordpress/) * In: [WordPress Mobile App](https://wordpress.org/support/forum/mobile/) * 6 replies * 3 participants * Last reply from: [Jeff (a11n)](https://wordpress.org/support/users/jmills38/) * Last activity: [1 day, 7 hours ago](https://wordpress.org/support/topic/hmac-verification-failed/#post-18965285) * Status: not resolved ## Topics ### Topics with no replies ### Non-support topics ### Resolved topics ### Unresolved topics ### All topics