Install libpam-kwallet-common by entering the following commands in the terminal:
sudo apt update sudo apt install libpam-kwallet-common
KWallet integration with PAM (common files)
The KDE Wallet system provides a secure way to store passwords and other secret information, allowing the user to remember only a single KDE Wallet password instead of numerous different passwords and credentials. . This package provides a the common files needed by the KDE 4 and Kf5 version of the PAM integration.