UPDATE: March 31 at 1:20 p.m. ET — HealthCare.gov is experiencing technical glitches once again, and is now not accepting applications from users trying to create new accounts, The Associated Press reported on Monday afternoon.

HealthCare.gov was down for approximately five hours on the last day to enroll to Obama's health care reform plan.

The site's online application was unavailable from about 3 a.m to 8 a.m. ET, according to CNBC. The site is now back up and running, but this is the latest hiccup in Obama's embattled health care online marketplace website, which has experienced technical issues since day one.

"HealthCare.gov marketplace application and enrollment system is currently unavailable," the Department of Health and Human Services said in a statement on early Monday morning, according to CNBC. "The tech team is working now to bring the system online as soon as possible."

The site normally goes offline between 1 a.m. and 5 a.m. ET, USA Today reported, but on Monday night, a software bug extended the scheduled downtime three hours past the normal time.

People who visited the site during the downtime were placed in a virtual "waiting room" and were asked to provide their email addresses in order to be notified when the site was back up.

The deadline to enroll is midnight on Monday, but the U.S. Department of Health and Human Services has said that people who miss the deadline because of technical issues will have additional time to sign up. The government has also said it will accept paper applications until Apr. 7.

As of last week, 6 million people had signed up for Obamacare, and that number is expect to rise to 7 million by end of day on Monday, according to the Obama administration.