[bisq-network/bisq] Not able to find peers witness, unable to sign for trade (#5674)

[Michal Zuber]

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### Description

Can't confirm payment

#### Version

1.7.2

### Steps to reproduce

After clicking on button Confirm payment I receive an error
```
[JavaFX Application Thread] ERROR b.c.t.Task: An error occurred at task: SellerSendPayoutTxPublishedMessage
Exception message: Not able to find peers witness, unable to sign for trade {} [Trade{
     offer=Offer{getErrorMessage()='null', state=AVAILABLE, offerPayload=OfferPayload{
     id='65418-300a1372-1574-495a-a533-19290321a179-172'
```

#### Device or machine

OS Arch Linux



#### Additional info

<!-- Additional information useful for debugging (e.g. logs) -->


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