PayPal Checkout>> Payment Error: Expected an order id to be passed

here at the end, I have PayPal payment but when I try to pay then I get so how I can fix it?

This error usually shows up when any of the mandatory fields are not filled and the submit button is clicked.

Also, could you please try deleting the PayPal Integration and then add once again to see if this resolves the issue.

Please note deleting the field will also delete the submissions for that field so before deleting the integration please take a backup of the submissions.

Before deleting make sure you have taken a backup of the submissions as submissions once deleted could not be restored again.

Exporting submissions: For exporting submissions from each form individually, please follow this guide:

https://www.jotform.com/help/44-How-to-Export-Form-Data-to-Excel

Let us know how it goes.

Thanks.