Quote from: NotATether on Today at 11:14:26 AM

Quote from: LZKTV520 on Today at 10:55:59 AM

Quote from: nc50lc on Today at 09:52:38 AM

Quote from: LZKTV520 on Today at 08:23:46 AM

This is how I do it, but it doesn't work! I unlocked it without synchronizing the blockchain.

Those commands will work whether your node is synchronized, disconnected or not.

Based from the hint above, do you somehow have a disablewallet=1 entry in your bitcoin.conf file or as an additional start parameter in your shortcut?
Because disabling the wallet will make 'wallet RPC commands' like walletpassphrase disabled.

After I downloaded the Bitcoin core wallet, no other operations have been performed. If I disable it, how can I find out? Then how to unban it? I'm a novice, please!

If you are using the GUI, then open Bitcoin Core, go to the menu entry Window > Console, and in the command prompt that appears, type "help".

It will display output like this:

https://i.ibb.co/cxwr8JS/Capture.png

See if walletpassphrase is in the list (or if a ==Wallet== entry is listed).

Okay, I’ll go home and try, what if I don’t? I downloaded it from the official website.