I am getting the error message "Challenge Not yet complete... here's what's wrong: 
'Accounts Temp Access' doesn't exists as a type flow. Check the instructions"
But the flow very much exists.  Any ideas?

Hello. I keep getting this error message.

Challenge Not yet complete... here's what's wrong:
There was an unexpected error in your org which is preventing this assessment check from completing: System.DmlException: Insert failed. First exception on row 0; first error: REQUIRED_FIELD_MISSING, Required fields are missing: [Suggestion_Category__c]: [Suggestion_Category__c]

Any idea how to fix this? I am on module "Adding Business Logic." I followed everything step by step so I am not sure what is going on with this error message. Any help would be greatly appreciated. Thanks.

Trailhead seems to not be working well today.  It isn't recording my completed challenges and now is saying that I need to log in, but then won't let me do so.  Any idea?

I am working in enterprise edition. As winter 14 changed... i am unable to see the option reset security token . In devoloper edition it is visible. So from Enterprise edition i am unable to find.