angular google maps error : Namespace 'google.maps' has no exported member 'MapMouseEvent'. code example

Example: Namespace 'google.maps' has no exported member 'MarkerChangeOptionEventNames'

// It seems, that Angular 11 does not work properly in combination with 
// @agm/core 3.0.0-beta.0 (newest version). Try to downgrade @agm/core to the previous 
// version 1.1.0.

"dependencies": {
    "@agm/core": "^1.1.0"
}

// (run npm install after changing the agm version)