Hi @amenconi,
This is a known issue resolved with a counterblock restart. Please see [WARNING] Blockchain reorganisation for more information.
Counterparty Counterwallet instance is set to restart daily, while the CoinDaddy instance https://counterwallet.coindaddy.io/ is set to restart every 8 hours. I suggest you give it another try in a few hours, or feel free to use the CoinDaddy server.