Can´t authenticate anymore

[ghost]

I am not able to authenticate the Rest Client anymore. It worked for a while but suddenly it run into an authentication error...

• The provided admin username 'admin' or password is invalid. The user needs to be a Magento admin.

I have 3 different instances of Magento working.

1* Live system -> Enterprise (1.14.3.6)
2* Dev system -> Enterprise (1.14.3.6)
3* clean instance of magento community (1.9.2.4)

At first, I´ve tried this Api on our Dev system which worked perfectly for almost 4 hours... Then the described error above occured.

I´ve double checked the REST settings in magento and the credentials as well. Everything is set correctly.
After some testing and debugging with Fiddler I came to multiple results to our different systems...

Here are my result

Live System:

I´ll receive the oauth Token and the corresponding confirmAuthorizeUrl.
The issue here is that the Authorize Landing page, where I have to associate the Application with my account, is the login page...
So if the RestApi is trying to get the oauth_authorize_confirm Form, it will result into null and the described error above occures.

" var formElement = authorizePage.GetElementbyId("oauth_authorize_confirm");
if(authorizePage.DocumentNode.InnerText.Contains("Invalid User Name or Password") || formElement == null) throw new MagentoApiException(string.Format("The provided admin username '{0}' or password is invalid. The user needs to be a Magento admin.", _userName));"

Dev System:

Same Fiddler result as the live system but there is one big issue.
The oauthToken is null all the time.

Clean instance:

Everything works fine! - No problems at all...
*Here´s the Fiddler session for the clean instance

This is my code, I am using

There´s a huge difference in the Fiddler log between live+dev vs. clean magento...
I don´t know what this issue could be, cause it worked for a couple of hours before.

Anyone an idea?

[rizwanqur]

have you solved your issue?
from: [email protected]