Hello,
We apologize for the issue you are facing with the Rank Math Pro update. The error message you are encountering, PCLZIP_ERR_BAD_FORMAT (-10), typically indicates that the downloaded package is corrupted or not in the expected format.
Here are a few steps you can try to resolve this issue:
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Download the Plugin Manually: Go to your Rank Math account area and download the latest version of Rank Math Pro manually.

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Upload the Plugin to WordPress: Navigate to your WordPress dashboard, go to Plugins → Add New, and then click on Upload Plugin. Choose the downloaded file and click on Install Now.

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Replace Current Version: If prompted, select the option to replace the current version with the uploaded one.

If these steps do not resolve the issue, please reply to this ticket, and a human agent from the Rank Math Support team will assist you further.
Thank you for raising this concern, and we hope to get this resolved for you soon!
Sources:
How to Update Rank Math Manually » Rank Math
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.
Now that is interesting:
Looks like I bought the PRO-Version in October 2022 (invoice enclosed) and renewed it in October 2023 (see screenshot).
But I can find no receipt on the rnakmath-site nor at fastspring.
The email is the right one, too.
HHHmmmm …
Pictures > https://imgur.com/a/yHZEOwJ
Hello,
We checked your account and we can see that the subscription expired on October 13, 2024, and we do not have any option to revert a subscription that has expired. You will have to make a new purchase:
– Rank Math PRO : https://rankmath.com/pricing/
If you still have any questions, just reply and we will be more than happy to clarify any doubts you might have.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.