An AppArmor policy prevents this sender from sending this message to this recipient.Cannot connect MySQL Workbench to MySQL server in ubuntu

  Cannot Connect to Database Server

Your connection attempt failed for user 'root' to the MySQL server at localhost:3306:

  An AppArmor policy prevents this sender from sending this message to this recipient; type="method_call", sender=":1.125" (uid=1000 pid=7944 comm="/snap/mysql-workbench-community/5/usr/bin/mysql- wo" label="snap.mysql-workbench-community.mysql-workbench- community (enforce)") interface="org.freedesktop.Secret.Service" member="OpenSession” error name="(unset)" requested_reply="0" destination=":1.13" (uid=1000 pid=2044 comm="/usr/bin/gnome- keyring-daemon --daemonize --login" label="unconfined")

Please:

1 Check that MySQL is running on address localhost

2 Check that MySQL is reachable on port 3306 (note: 3306 is the default, but this can be changed)

3 Check the user root has rights to connect to localhost from your address (MySQL rights define what clients can connect to the server and from which machines)

4 Make sure you are both providing a password if needed and using the correct password for localhost connecting from the host address you're connecting from

There no field for entering password. It shows two options store in keychain and clear. On selecting store in keychain it prompts for a password, and I enter the password. But then it shows an error: 

You have installed MySQLWorkbench as a Snap package. You want to store the database password(s) in the Gnome Passwords & Keys facility.

SOlution :-

However, a Snap package is sandboxed; it is not by default allowed to access this service. When you choose "Store in keychain" MySQLWorkbench is blocked by AppArmor.

You need to enter a command to allow this package to access the service. The command is:

sudo snap connect mysql-workbench-community:password-manager-service :password-manager-service