I found the mistake that was causing the error on my side. I did not notice that I could create an invoice to complete the transaction in sale.
Once I set the invoice and scan it from the app, I successfully completed the transactions. Thank you for the patience.
Successful deposit from invoice payment using V4V.app
Successful withdrawal using V4V.app invoice creation in sale
I was doing the LNURL transaction in V4V app that was the problem.
Thank you
