After you have entered restore height, Monero CLI will then restore your wallet and start the wallet synchronization. Please be patient as this process may take a while. You will need to wait for it to finish before start using your wallet.
If you run into any trouble, running `./monero-wallet-cli --help` will show you the options available to you at wallet startup. Once you're inside your wallet, running the `help` command will list the help for the commands available to you within the wallet.
This problem usually occurs when you set a restore height that is higher than the block height of the first incoming transaction to your wallet. To solve this issue, you will have to change the wallet restore height. Please read [this guide]({{site.baseurl}}/resources/user-guides/change-restore-height.html) for detailed instructions on how to do this.