Namespace 'google.maps' has no exported member 'MarkerMouseEventNames'. @agm/core 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)