Solution: Cannot approve a trade/accept an i-WAT ticket i-WAT
All
You cannot click on "Accept" or "Approve" button on the i-WAT message window because it is grayed out.
Perhaps there is a risk detected by i-WAT because either the signature cannot be verified or the trust is uncertain for the public key of the signer.
In these cases, i-WAT grays out the button to continue the trade to protect you from mistakenly clicking on it.
You must reject/disapprove the trade.