Trying to complete the Build a Cat Rescue App.

I need to install the Einstein Vision app. I need to:

1. Upload my Einstein key
2. Install the app correctly

I added the Einstein key, as per directions, and I installed the app, but I'm receiving this error:

"There was an unexpected error in your org which is preventing this assessment check from completing: System.SecurityException: Invalid Crypto Key"

What do I do?

I'm completing a Hands On Challenge; the challenge is to create a button in the Lightning Experience. 

Here are the instructions:

Add a custom button to a contact
Ursa Major Solar wants to be able to look at their contacts’ internet footprints. Create a custom button so users can do this right from a contact record.
Create a custom button for the Contact object
Label: Google Info
The custom button opens a link to http://google.com?q={!Contact.Name} (where {!Contact.Name} is the current contact's name)
Add the custom button to the Contact Layout page layout

I've created a Detail Page Button called Google_Info, literally copied & pasted the above URL, and added it to the Contact Layout page layout.

I'm getting this error: 
Challenge Not yet complete... here's what's wrong: 
There was an unexpected error while verifying this challenge. Usually this is due to some pre-existing configuration or code in the challenge Org. We recommend using a new Developer Edition (DE) to check this challenge. If you're using a new DE and seeing this error, please post to the developer forums and reference error id: AOYGYYSC

I'm completing a Hands On Challenge; the challenge is to create a button in the Lightning Experience. 

Here are the instructions:

Add a custom button to a contact
Ursa Major Solar wants to be able to look at their contacts’ internet footprints. Create a custom button so users can do this right from a contact record.
Create a custom button for the Contact object
Label: Google Info
The custom button opens a link to http://google.com?q={!Contact.Name} (where {!Contact.Name} is the current contact's name)
Add the custom button to the Contact Layout page layout

I've created a Detail Page Button called Google_Info, literally copied & pasted the above URL, and added it to the Contact Layout page layout.

I'm getting this error: 
Challenge Not yet complete... here's what's wrong: 
There was an unexpected error while verifying this challenge. Usually this is due to some pre-existing configuration or code in the challenge Org. We recommend using a new Developer Edition (DE) to check this challenge. If you're using a new DE and seeing this error, please post to the developer forums and reference error id: AOYGYYSC