Hello,
We apologize for the issue you are facing with updating the Rank Math SEO PRO plugin. The error message you are encountering, PCLZIP_ERR_BAD_FORMAT (-10)
, typically indicates that there is a problem with the plugin package being downloaded or that the package is corrupted.
Here are a few steps you can take to resolve this issue:
-
Reconnect Your Website with Rank Math: Sometimes, simply reconnecting your website can resolve update issues. You can do this by going to WordPress Dashboard → Rank Math SEO → Dashboard → Help, and then click Disconnect Account. After that, click on Connect Now to reconnect.

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Check for Plugin Conflicts: There might be a conflict with another plugin or theme. You can check for conflicts by following our guide on Plugin/ Theme Conflict With Rank Math.
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Manual Update: If the automatic update continues to fail, you can manually update the plugin. Download the latest version of Rank Math from your account and upload it via Plugins → Add New → Upload Plugin in your WordPress dashboard.
-
Check Server Settings: Ensure that your server settings allow for file modifications and that there are no restrictions preventing the update.
If these steps do not resolve the issue, please reply to this ticket with your site URL, and a human agent from the Rank Math Support team will assist you further. Thank you for raising this concern!
This is an automated reply from Rank Math Support Bot. Your ticket has been assigned to a human agent and we will get back to you shortly.
Hello,
Thank you for contacting us and sorry for any inconvenience that might have been caused due to that.
It seems like you purchased the plugin with some other email address.
Can you please share the email address which you used to purchase the plugin or you can search and forward the receipt from FastSpring.com so we can locate your account?
Back to your issue, one possible reason for this error is trying to update the PRO version of the plugin while connected to your free account.
For more details, you can check this URL:
https://rankmath.com/kb/fix-pclzip-err-bad-format/
Looking forward to helping you.