onInstallationUpdate, onInstallationUpdateAdd and onInstallationUpdateRemove event handlers

 Your code does something else that it should.. the binding there is not allowed.

You would do either

this.onInstallationUpdate(this.botHandler1);
this.onInstallationUpdateAdd(this.botHandler1);
this.onInstallationUpdateRemove(this.botHandler1); 

private botHandler1 = async (context: TurnContext, next: () => Promise<void>): Promise<any> => {
  console.log('what happened? ', context.activity.name); 
  await next();
}; 

Or either override activity methods like:protected onInstallationUpdateAddActivity(context: TurnContext): Promise<void> { console.log('on installation add activity ', context.activity); return super.onInstallationUpdateAddActivity(context); } 

override onInstallationUpdateAddActivity(context: TurnContext): Promise<void> {
    console.log('on installation add activity ', context.activity);
    return super.onInstallationUpdateAddActivity(context);
  }

Hope this will solve your issue 2 years after you've dealt with it 🙂