Pi-Keyring

Raspberry-Pi : Keyring

Authentication required: An application wants access to the keyring "Default keyring", but is locked

The issue you're encountering is related to the way the GNOME Keyring (which is used to store passwords securely) interacts with auto-login. By default, the GNOME Keyring is locked until you enter your user password. When auto-login is enabled, you bypass entering the password at login, which leaves the keyring locked. This is why the keyring prompts for a password when an application (like Chrome, or a network manager) tries to access it.

Use Seahorse to manage the passwords and encryption keys in Linux. 

$ seahorse

If Seahorse is not installed then install it

$ sudo apt install seahorse

(you just installed 'Accessories/Passwords and Keys)

look for the app that is giving you the problems

click on the key icon to view the current password

change the enter your current password and save

----------------------------

another reason is that chromium cannot detect the gnome desktop to gain access to the password list

(see chromium - h, look at password entry)