I am trying to use KWallet, but when I enter the KCM menu, it shows that I am not allowed to save settings. But Wallet Manager works well. I have tried to remove ~/.config/kwalletrc and ~/.config/kwalletmanager5rc but it doesn’t work.
Is there anyone can help me? Thank you in advance.
Welcome to the forum! 
What do you mean by “it doesnt’ work”? Do you not have write access to your home directory?
I have the write permission, or I can’t delete those two files. I mean even I removed those two files, I can’t save settings in KCM menu either. I have also tried to delete wallet and create a new one, but this problem still there.
TBH i don’t understand what you are talking about, could you link a picture to what you said ?
sm.ms/image/NJOdTbR7V8YMmW5
Here is the screenshot of my problem. Sorry I am not allowed to insert media or link in the forum. You have to add “https://” ahead of the link manually.