Unable to send a transaction from the Webapp

Trying to send a Tx from the official webapp now fails.

Error message:
```
usePCZT.ts:162 Error: Failed to send transaction (code -25): failed to validate tx: WtxId("private"), error: transaction did not pass consensus validation: transaction uses an incorrect consensus branch id
```


This seems to be related to the NU 6.1 upgrade.

Currently, this means that funds are locked in the wallet