For those keeping track, Jetpack 6.3.1 technically exists, but was never officially released. 6.3.2 is the latest and recommended version.
For this point release, we fixed a compatibility issue with the Simple Payment Widget, released yesterday, with PHP versions 5.3 and below. Initially this widget caused fatal errors upon activation.
The full changelog has more details on this update, and we’re able to answer questions via our support channels.
Thanks for your support!
This entry was posted in Releases and tagged jetpack 6.3, Jetpack 6.3.1, Jetpack 6.3.2. Bookmark the permalink.
Jetpack 
This broke my site. On _two_ of my multisite network’s subsites, it’s causing a fatal PHP error (but weirdly, not on the rest, even though it’s network activated).
I get this error: PHP message: PHP Fatal error: Uncaught Error: Class ‘Jetpack_Simple_Payments’ not found in /var/www/wordpress/wp-content/plugins/jetpack/modules/widgets/simple-payments.php:479
Googling that only found other sites that at some point were also getting that error.
Having to downgrade back to 6.2.1.
Running PHP 7.0.30 and nginx 1.10.3 with the latest WordPress.
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Thank you for reaching out to us about this error, and I apologize for the major inconvenience Jetpack has caused.
We’ve identified a critical issue in Jetpack, which may cause PHP Fatal errors on multisite installations. You can either:
– wait for Jetpack’s next update, which will address this
– manually patch the affected file
You can track our fix’s progress, here:
– https://github.com/Automattic/jetpack/pull/9871
If you’d like to manually patch the affected file, please implement the changes shown here:
– https://github.com/Automattic/jetpack/pull/9871/files
If you have any additional questions on this, please contact us via email.
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Thanks for directing readers to the patch. It did the trick for now.
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I have the same problems !!! In plesk I installed php 7.2.8
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Thank you for reaching out to us about this, Dr. Best! Please check the email associated with your WordPress.com account; I’ve sent you an email asking for more details.
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Thank you so much for reporting the details. I had exactly the same symptoms, multisite network with several sites, but only two broke and logging the same message.
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This problem is reported as fixed in Jetpack version 6.4 (https://jetpack.com/2018/08/07/jetpack-6-4-release/).
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Yes, it’s fixed now. Thank you very much!
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Fantastic! I’m glad the latest version addresses the issue you were having. 🙂
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