Make sure that the NEON wallet app is closed (this sometimes creates problems)
Use the following procedure to capture any Javascript errors in Google Chrome.
Following these steps to get the error codes:
Set up the trade, display the trade confirm dialog
Open the Javascript console Mac: Command+Option+J PC: Control+Shift+J
Clear the console log by clicking the 🚫 Icon
Click the Broadcast button to start trade
Capture a screenshot from the Javascript console and send to us.