Have you registered? You must register in order to log in. If you have registered and you still cannot log in then check and double-check your username and password.

If you are getting a message like "E_HUBZERO_USER_PLUGIN_FAILED", here is the fix:

Log in to ORCID
Go to https://orcid.org/signin and sign in with your credentials.

Go to Account Settings
Click your name or profile picture in the upper-right corner and select Account settings (or go directly to https://orcid.org/account).

Set Default Privacy to Public
Scroll to the "Visibility preferences" section.
Find "Default visibility" and choose Everyone (Public).

Check Individual Items
Even if your default is public, some items might have been set to Limited or Private.
On your main ORCID record page, look for the small visibility icons (green globe for Public, yellow lock for Limited, red lock for Private) next to each section (e.g., employment, education, works).
Click the icon and select the green globe to make each item public

Go to Account Settings → Emails
You can also go directly to https://orcid.org/my-orcid and scroll down to the Email and Contact section.

Adjust the Visibility Icon
Next to your email address, you’ll see a visibility icon:
Click the icon and select the green globe to make it public.

Confirm Your Email is Verified

ORCID only allows a public display of emails that have been verified.
If you see a “Verify” button next to your email, click it and follow the confirmation email link before setting visibility to Public.
 

Usually one of these is the problem; if not, contact support.