Reply To: Error : You can use a stripe token more than once

@ladyco
Hello,
With an internal server error, you should be able to see details about this in your error_log that can give a bit more information about this.
What do you see in your error log(last 20 lines or so)? Can you post that here?

If you deactivate all plugins except: WooCommerce, WC Vendors and WC Vendors Pro, do you still have an error at checkout?
Does this happen with all vendors?