I checked this for you and looks like you were able to make payment using your PayPal account, you can check it under your Transactions. Let us know if you still experiencing the same issue and we'll have one of our agents reach out to you directly to assist you further. Thank you.
Sorry to hear that you are having trouble using Paypal on your Upwork account. I see that you already chatted with our customer support team regarding the issue. Please follow the instruction they provided in order to resolve this concern. If you have other questions or concerns, feel free to reach out, we're here to help. Thank you!