I have a problem with my trailhead "Quick Start: Salesforce DX".
I'm trying to do this:

sfdx force:org:create -s -f config/project-scratch-def.json -a "default scratch org"

But become an Error: You do not have access to the [scratchorginfo] object

I make all right, step by step. Connected status is "Connected". How can I fix it?

I am on the last module of the Build a Discount Calculator trail. I have verified the first 4 steps and received the 50 points (everything was configured correctly). Now, when I try to verify my last step I am getting the following error:

Challenge Not yet complete... here's what's wrong: 
The 'Calculate Discount' custom button doesn't exist or isn't properly configured. Check the instructions.

I've verfied the creation of the button, it's on the correct page layout and I've tested the button- it gives me the correct discount percentage and discounted amount.

Any other ideas on what I should check? I'm at a loss.

Hello, I am eagerly waiting for the rest of the modules to be updated. Any ideas when will the rest of the modules be updated like:
Apex Integration Services , Visualforce & JavaScript ..