In the Trailhead module "Combine the Power of Process Builder and Cloud Flow Designer "- How does one create the "sObjects Variable | Opportunity | StageName" in an autolaunched flow?  There are no instructions in the module on how to do this.  The directions given in the module do not work: 
From the Palette tab, drag an Assignment element onto the canvas.
Name it Update Opportunity Fields.
Set the stage to Prospecting.
   For Variable, select SOBJECT VARIABLES | opportunity | StageName.
   For Operator, select equals.
   For Value, select PICKLIST VALUES | Prospecting.

Hi I am doing the Assign Top Leads to Your Sales Rep Trailhead module >> https://trailhead.salesforce.com/trails/learn-admin-essentials/projects/prioritize-leads-with-einstein-lead-scoring/steps/assign-top-leads-to-your-sales-rep and when clicking on the Verify Step button at the bottom of the page I get an error
Step not yet complete... here's what's wrong:
We can't find criteria and immediate actions for Einstein Scores greater than or equal to 80.

This error message is not accurate as the steps in the process builder are there, however, I suspect the error is actually due to an email that I receive immediately after pressing the Verify Step button, I have copied and pasted the contents of the email below, any advice/help would be appreciated.

Subject: Developer script exception from Honeydew : 'LeadScoreGenerator' for job id '7071t000000V3oh' : Unauthorized endpoint, please check Setup->Security->Remote site settings. endpoint = https://eu16.salesforce.com/services/data/v43.0/composite/tree/ScoreIntelligence

ApexApplication <info@jp.salesforce.com>12:03 (9 minutes ago)
to me
Apex script unhandled exception by user/organization: 0051t000000MOhX/00D1t000000DWM6

Failed to invoke future method 'public static void createScoreAndFactors(List<Id>)' on class 'LeadScoreGenerator' for job id '7071t000000V3oh'

caused by: System.CalloutException: Unauthorized endpoint, please check Setup->Security->Remote site settings. endpoint = https://eu16.salesforce.com/services/data/v43.0/composite/tree/ScoreIntelligence

Class.LeadScoreGenerator.sendRequest: line 130, column 1
Class.LeadScoreGenerator.createScoreAndFactors: line 108, column 1