Incompatible Archive Error in WordPress 6.4.3

Have you faced the ‘Incompatible Archive Error in WordPress’ after updating to WordPress 6.4.3 when trying to install our themes and plugins? These themes and plugins come as a zip download, so you may see the installation fail and WordPress shows a generic ‘Incompatible Archive’ error. This issue has confused many of them in the WordPress community. But no worries, we are here to guide you on why this is happening and how you can fix it.

This happened because of a bug introduced in WordPress 6.4.3, specifically this changeset: There is a bug fix and core trac ticket to follow about this issue here:

How to fix the Incompatible Archive Error?

This issue will be solved in WordPress version 6.4.4 but before it’s release, you can simply install “Force using PclZip” plugin and then all the zip installation will work normally.

How to install Force using PclZip Plugin?
1. Download the plugin zip file from
2. Go to “Plugins => Add New => Upload Plugin”, then browse and locate the plugin zip file you have downloaded
3. Click on “Install Now” and then Activate the plugin.

After this, you can upload the theme zip file from “Appearance => Themes => Add New => Uploads”

The WordPress community is working actively on resolving this issue in an upcoming release. By staying engaged with the WordPress community through forums and tracking updates, you can stay updated about the latest solutions and ensure your site remains unaffected.

If you’re still having trouble installing any of our themes and plugins or if you simply don’t know what to do, please get in touch with our support team.

3 thoughts on “Incompatible Archive Error in WordPress 6.4.3”

  1. Thanks for sharing this detailed solution to the ‘Incompatible Archive Error.’ The temporary fix using the “Force using PclZip” plugin is helpful, and it’s great to know that the WordPress community is actively working on a permanent resolution in the upcoming release

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