Dear @afzalsakil,
We hope this message finds you well. To address the issue you are experiencing, we kindly ask that you refer to the following article for guidance: https://www.8theme.com/documentation/documentation/troubleshooting/troubleshooting-pclziperrbadformat-10-during-theme-core-plugin-update/
Should you require any further assistance, please do not hesitate to reach out.
Warm regards,
The 8Theme Team