The legacy login is the same login experience you have used in the past. If you encounter an error while logging into the new SAM login experience, you should take the following steps:
Step 1. Visit the legacy login:
Step 2. Immediately close your browser.
Step 3. Return to login.
This action will set a cookie, directing you to the legacy login for 7 days. After 7 days you will see the new login experience again. If you want to use the new login experience within the 7 day period, access SAM by clicking the SAM PROD Access Link or the SAM UAT Access Link.