Login to Admin Panel by default admin
Open menu Configuration -> Blockchains and push the button "..." for each row of the blockchains list:
...
You should create wallet again for another blockchain (if you have more than 1 blockchain)So, return to the current and next step in the loop until you create wallets for all blockchainswallet (main system wallet = hot wallet) for each blockchain you use.
Create system wallet for selected blockchain
Push button Click "Create wallet" :button in blockchain details
...
Click "Reload" for make sure you got the address of the wallet:
...