Hello!

I can't finish the trailhead
https://trailhead.salesforce.com/content/learn/modules/identity_login/identity_login_my_domain

due to the next error:
There was an unhandled exception. Please reference ID: XNOIWBUC. Error: Faraday::ConnectionFailed. Message: Failed to open TCP connection to resourceful-panda-ujhuef-dev-ed.my.salesforce.com:443 (getaddrinfo: Name or service not known)

Moreover, can't check any other modul in this DE Playground:
oliinykmyk@resourceful-panda-ujhuef.com
:(

It happened after changing My Domain to the next:
consultkiev-dev-ed-dev-ed

I'd waited for 6 hour than checked again - the same error...

Have any idea on this issue? Or it's better to create new DE Playground (is yes - HOW?) and don't change My Domain?

Thank in advance!