Customize Your Login Process with My Domain

When I try to launch my trailhead developer edition, It fails with below error

"This site can’t be reached
curious-badger-vv2jvj-dev-ed.my.salesforce.com’s server IP address could not be found."

I am guessing because of the new domain created. 

But the trailhead is still trying to connect the old domain how to make it redirect it to new domain.
Please help me complete this challenge

Hi,

I'm not able to complete #2 Automate Accounts. It give me the following error.
"Challenge Not yet complete... here's what's wrong:
Please check the configuration of the custom fields on the Account object. The formulas, rollup summaries, etc. did not produce the expected outcome."

Can anyone tell me what went wrong? Thanks.

My Custom Fields configuration are as following:

• Number of deals (Roll-Up Summary field): Count Opportunity. No filter criteria
• Number of won deals (Roll-Up Summary field): Count Opportunity with filter criteria as "Stage equals Closed Won"
• Last won deal date (Roll-Up Summary field): MAX(Opportunity: Close Date) with filter criteria as "Stage equals Closed Won"
• Deal win % (Formula field): Number_of_won_deals__c / Number_of_deals__c
• Total amount of won deals (Roll-Up Summary field): SUM(Opportunity: Amount) with filter criteria as "Stage equals Closed Won"
• Call for Service (Formula field): IF( DATE( YEAR(Last_won_deal_date__c)+2 , MONTH(Last_won_deal_date__c) , DAY(Last_won_deal_date__c) ) <= TODAY(), 'YES', 'NO')