I follow this wiki guide and this thread. After executing the command importprivkey mylongprivatekey in the Console, I see a popup window saying
[MyWallet] Rescanning...
and that takes couple of hours to finish. When it's done, I do not see Address Book show up next to Transactions as in the wiki page.
I thought one issue may be that the wallet get locked after the 10 minutes allowance. But I tried longer time, like 4 hours. Same issue.
I'm using bitcoin-0.20.0.

