If you are using the Mysterium VPN app on your Mac or iOS device and experiencing issues with the connection tunnel, it could be due to lack of granted permissions (Error code 1111).
Here is the way to resolve it:
Reset tunnel Settings
Open the Mysterium VPN app
Navigate to the Settings > Connection setup screen
Click the reset app button
Note! This feature will disable the connection tunnel and prompt you to authorize the setup of a new one. It can assist in resolving problems with the connection tunnel and lack of permissions.
Feature is available starting from the 2.0.1 app version.