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SteveMoSteveMo 

Trailhead Login Loop

When I try to log in to Trailhead using the "Login Using Salesforce" button in the pop-up I just get kicked into a loop that brings be back to the original Login/Sign Up page, Wash, Rinse, Repeat...    
I've tried all of the Usual Suspects:Chrome, Firefox, Clear Cache, Clear Cookies, have another Beer...  but no luck  :-(  
 
User-added image

 
Mike WrightMike Wright
Similar problem, but I get:

'Problem Logging In
We can’t log you in because of the following error.
REGISTRATION_HANDLER_ERROR: ACCESS_DENIE​D_eu9.salesforce.com'

I had a demo username - now an enterprise user account.  Trying to login with my enterprise username get the error above.  Demo allows me in - not helpful.

SF support not interested.
Amit Chaudhary 8Amit Chaudhary 8
Hi SteveMo,

I just tested same, i am able to login. Can you please try now

 
SteveMoSteveMo
I just did...  still no luck, same thing:
1. Click "Login" Link => https://trailhead.salesforce.com/  
2. Click "Log in with Salesforce" button in pop-up
3. Get kicked back to https://trailhead.salesforce.com/  
Mike WrightMike Wright
Looks like I'm screwed.  Going round in circles with 'support'.  None of my users can access TrailBlazers or TrailHead.  All getting the same error:

'Problem Logging In
We can’t log you in because of the following error.
REGISTRATION_HANDLER_ERROR: ACCESS_DENIE​D_eu9.salesforce.com'

​I can only access these pages with my demo account - which expires in 13 days - at which time i assume, my access to any form of help will go with it.
Jacqueline DiMareJacqueline DiMare
Here's what worked for me, as an admin user in the production org: 

From setup, select Connected Apps OAuth Usage
Install and Unblock the Salesforce Developers connected app
Make sure that the profile or permission set for the user trying to login to Trailhead is listed under Manage App Policies