Title: Plugin update causes fatal error Last modified: November 4, 2020 --- # Plugin update causes fatal error * [dalberts69](https://wordpress.org/support/users/dalberts69/) * (@dalberts69) * [5 years, 6 months ago](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/) * Greetings, * After updating this plugin from the latest release, a WSOD appears. * Looking at the Bugsnag logs, the issue is with the lack of a “Utils” class in Guzzle at activecampaign-for-woocommerce/ac_vendor/guzzlehttp/psr7/src/functions. php line 41 * `Class 'AcVendor\GuzzleHttp\Psr7\Utils' not found` * Checking with the Guzzle Repo looks like they refactored the functions.php file compared to the version seen in this plugin: [https://github.com/guzzle/psr7/blob/master/src/functions.php](https://github.com/guzzle/psr7/blob/master/src/functions.php) * Thanks! Viewing 15 replies - 1 through 15 (of 34 total) 1 [2](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/page/2/?output_format=md) [3](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/page/3/?output_format=md) [→](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/page/2/?output_format=md) * [Richard](https://wordpress.org/support/users/rgenck/) * (@rgenck) * [5 years, 6 months ago](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/#post-13622577) * I’m getting this error too, had to revert to previous veresion * [slightlydifferent](https://wordpress.org/support/users/slightlydifferent/) * (@slightlydifferent) * [5 years, 6 months ago](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/#post-13622646) * Similarly: * `PHP Fatal error: Uncaught Error: Class ‘AcVendor\\GuzzleHttp\\Psr7\\Utils’ not found * [AnimeSubways](https://wordpress.org/support/users/animesubways/) * (@animesubways) * [5 years, 6 months ago](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/#post-13622704) * Same at my end! How to restore this specific plugin? * [Cesar Palacio](https://wordpress.org/support/users/cpalacio/) * (@cpalacio) * [5 years, 6 months ago](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/#post-13622726) * Same error, I can’t find the previous version. I appreciate you can tell me where to download it * [Richard](https://wordpress.org/support/users/rgenck/) * (@rgenck) * [5 years, 6 months ago](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/#post-13622853) * I had a backup of the site which I was able to use. * If you don’t have a backup, you can use the “Rollback” plugin on WordPress, that would probably be the easiest solution for now: [https://wordpress.org/plugins/wp-rollback/](https://wordpress.org/plugins/wp-rollback/) * You will need to first disable all plugins, usually done by logging into your file manager, then rename the folder in /wp-content/plugins to something like/ wp-content/plugins1 * Then visit your plugins page, that will deactivate all plugins. Then rename your plugins1 folder back to plugins. Then, install the WP Rollback plugin, rollback this ActiveCampaign for WooCommerce plugin to the previous version, and lastly, reactivate all of your plugins. * [Cesar Palacio](https://wordpress.org/support/users/cpalacio/) * (@cpalacio) * [5 years, 6 months ago](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/#post-13622905) * Thanks for your answer, unfortunately I have no backup and i used WP-Rollback without success * [Richard](https://wordpress.org/support/users/rgenck/) * (@rgenck) * [5 years, 6 months ago](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/#post-13622909) * You were able to get the rollback plugin to roll “ActiveCampaign for WooCommerce” to the previous version, and your site is still down after you activate it in the previous version? * I don’t know what to tell you, it worked for me to go to the previous version, and just wait on the next update. * I could share the previous version as a Zip file, though I know most people don’t trust those. * Up to you. I can share it on Google Drive. You would have to delete the previous file from the /wp-content/plugins folder, then extract the zip file. Let me know if you want to and I’ll get it setup, otherwise we can just wait on the plugin author to fix the bug. * [Cesar Palacio](https://wordpress.org/support/users/cpalacio/) * (@cpalacio) * [5 years, 6 months ago](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/#post-13622912) * I would appreciate it, while I support make an update * [Cesar Palacio](https://wordpress.org/support/users/cpalacio/) * (@cpalacio) * [5 years, 6 months ago](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/#post-13622915) * I appreciate you sharing it, because I don’t know how long the update will take * [westhillsweb](https://wordpress.org/support/users/westhillsweb/) * (@westhillsweb) * [5 years, 6 months ago](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/#post-13623066) * I have the same problem: [https://prnt.sc/vdq5ya](https://prnt.sc/vdq5ya) Please fix or provide a link to download the prior version. Current version appears to be 1.2.11. In the meanwhile, I’ve had to deactivate the plugin. -M * [westhillsweb](https://wordpress.org/support/users/westhillsweb/) * (@westhillsweb) * [5 years, 6 months ago](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/#post-13623076) * I just noticed that the current version of this plugin here: [https://wordpress.org/plugins/activecampaign-for-woocommerce/#developers](https://wordpress.org/plugins/activecampaign-for-woocommerce/#developers) shows that the current version is 1.2.12 and that it was updated 9 hours ago, although it says it was for documentation only. The first post about this error was about 6 hours ago, so I’m unclear if current version has fixed this bug or not. Any clarity on this would be helpful. -M * [Cesar Palacio](https://wordpress.org/support/users/cpalacio/) * (@cpalacio) * [5 years, 6 months ago](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/#post-13623079) * The error seems to be 1.2.12 * [yesyesman](https://wordpress.org/support/users/yesyesman/) * (@yesyesman) * [5 years, 6 months ago](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/#post-13623107) * [@rgenck](https://wordpress.org/support/users/rgenck/) please share in dropbox! * I have same issue and cant get rollback to fetch previous, says: “It appears there are no version to select. This is likely due to the plugin author not using tags for their versions and only committing new releases to the repository trunk.” * [westhillsweb](https://wordpress.org/support/users/westhillsweb/) * (@westhillsweb) * [5 years, 6 months ago](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/#post-13623145) * Update: I moved the folder from /plugins to a temporary location at /plugins- disabled Site began working immediately. I then got onto support chat at ActiveCampaign. The person there wanted to see the error so I put the plugin back into /plugins and activated the plugin. And dammit, it started working. No error. Gone. However, the problem may be triggered only when the plugin communicates with ActiveCampaign after an event, such as when a cart is abandoned. So it may yet crash. She’s trying to debug the issue by looking at the logs, even though it appears to be gone. -M * [Cesar Palacio](https://wordpress.org/support/users/cpalacio/) * (@cpalacio) * [5 years, 6 months ago](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/#post-13623152) * In my case, delete the plugin and install it from scratch, it does not generate an error, but entering the api credentials to activate it does nothing. Checking the console log I have: – Failed to load resource: the server responded with a status of 500 () /wp-admin/admin-post.php – Uncaught TypeError: Cannot read property ‘data’ of undefined at Object. (activecampaign-for-woocommerce- admin.js?ver=1.2.11:6) at i (jquery.js?ver=1.12.4-wp:1) at Object.fireWith [as rejectWith] (jquery.js?ver=1.12.4-wp:1) at x (jquery.js?ver=1.12.4-wp:1) at XMLHttpRequest. c (jquery.js?ver=1.12.4-wp:1) Viewing 15 replies - 1 through 15 (of 34 total) 1 [2](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/page/2/?output_format=md) [3](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/page/3/?output_format=md) [→](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/page/2/?output_format=md) The topic ‘Plugin update causes fatal error’ is closed to new replies. * ![](https://ps.w.org/activecampaign-for-woocommerce/assets/icon-256x256.png?rev =1925389) * [ActiveCampaign for WooCommerce](https://wordpress.org/plugins/activecampaign-for-woocommerce/) * [Support Threads](https://wordpress.org/support/plugin/activecampaign-for-woocommerce/) * [Active Topics](https://wordpress.org/support/plugin/activecampaign-for-woocommerce/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/activecampaign-for-woocommerce/unresolved/) * [Reviews](https://wordpress.org/support/plugin/activecampaign-for-woocommerce/reviews/) * 34 replies * 16 participants * Last reply from: [Estevez96](https://wordpress.org/support/users/estevez96/) * Last activity: [5 years, 2 months ago](https://wordpress.org/support/topic/plugin-update-causes-fatal-error-2/page/3/#post-14076377) * Status: not resolved