Hello @brianoflondon
I hope you and your family are doing well. My sympathies are with you and your people and I hope this terrible and senseless war is over soon.
This event embarrasses me and I am afraid that this event will misrepresent me and my behaviour if I have problems on the v4v.app.
The v4v.app works with the smartphone without any problems, but via a local service (RTL, Thunderhub) the bills are rejected.

Payments are also executed via direct access via a Linux terminal without any further problems.

I don't understand the error message from RTL and Thunderhub because the same invoice works via the QR code on the smartphone and when entered directly in the terminal.
This is not a big problem from my point of view, but I wanted to tell you.

Best wishes and all the best to you.
Condeas Shell