Quote from: GalloNegro on February 15, 2019, 04:48:24 AM

Anybody else having issues with the Horizen wallet?

Error:

A general unexpected critical error has occurred:
com.eclipsesource.json.ParseException: Unexpected end of input at 1:1
See the console/logfile output for more detailed error information!

This kind of error typically happens if zend does not start properly.

You must do re-indexing here is a guide:
https://github.com/ZencashOfficial/zencash-swing-wallet-ui/blob/master/docs/TroubleshootingGuide.md 4

Here is a more robust guide that is an all in one for swing on the wiki
https://horizenofficial.atlassian.net/wiki/spaces/ZEN/pages/136872053/ZENCashWallet+Swing+Wallet+-+Backup+Upgrade+and+Troubleshooting 3

Whatever you do be sure to make a copy of wallet.dat file on safe location!