Start payment using... blank

I’m trying to complete a trade, using zelle usd to buy btc.

For every other trade I have seen some info about the seller, like a phone number or email to use in zelle.

This is the first time no info is showing up, just the dollar amount and then “payment started” button.

I let the seller know via trader chat, that I am stuck. I’m baffled as to how I’m supposed to start payment or what happens if I cannot send payment.

Sounds like it could be a failed trade. I would open mediation by clicking on the trade and then clicking: ‘Ctrl + o’ or ‘alt + o’ or ‘cmd + o’