Trade stuck before step 1

I now have encountered the exact same problem. Trade stuck before step 1. Taker fee transaction did not confirm / does not exist on block explorer.

I can’t even open a dispute. Pressing crtl+o opens a window, but when I click the button “Open Support Ticket” the window closes and nothing happens.

What can I do? Restarting the application does not help.
This is my first ever trade (I’m selling BTC for EUR via SEPA) Arbitrator for this trade is “my4t3kedin7k63a6.onion:9999”. I am using Bisq 1.0.1 on Lubuntu.

My trade partner has a 0 day old trading account and a PT bank account.

What can I do? Please help!