In am trying to complete the challenge: Install a Managed Package in your Trailhead Playground
I have installed Dreamhouse app successfully ...I even received the confirmation email and its clearly listed in the installed app list.  It won't allow me to reinstall as it is already there. But when "confirming" the challenge, I receive the error Challenge Not yet complete... here's what's wrong: 
You haven't installed the DreamHouse app package. 

I will move on to the next lesson but would be good to receive the badge/points. thanks in advance. 

In am trying to complete the challenge: Install a Managed Package in your Trailhead Playground
I have installed Dreamhouse app successfully ...I even received the confirmation email and its clearly listed in the installed app list.  It won't allow me to reinstall as it is already there. But when "confirming" the challenge, I receive the error Challenge Not yet complete... here's what's wrong: 
You haven't installed the DreamHouse app package. 

I will move on to the next lesson but would be good to receive the badge/points. thanks in advance.