How to Fix HBO Max Streaming Service Error Code 100, 321 or 420

HBO Max lets you stream some of the popular TV shows and movies you can find online. You can binge-watch all weekend with titles like Anthony Bourdain: Parts Unknown, Doctor Who, Looney Tunes, Adventure Time, The Big Bang Theory, Friends, Band of Brothers, Game of Thrones, and Six Feet Under.

However, there are times when you are unable to access HBO Max on your device. You may see problems like HBO Max service error code 100, 321, or 420. These issues happen when there is something wrong with your network connection. At times, it is due to the server connection on HBO Max. When you encounter these error codes after launching HBO Max, you can fix them by following the workarounds and troubleshooting methods below.

Ways to Fix HBO Max Error Code 100, 321 or 420

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Seeing the HBO Max error codes 100, 321, and 420 can be frustrating, especially if you look forward to a relaxing evening of video streaming your favorite TV series. One of the things to do is to exit your HBO Max app and try again. Doing so helps as its refreshes your connection and restarts the app.

Another way is to power cycle your devices to refresh your network connection. To power cycle, turn off your devices and unplug your router and modem. Wait for at least 1 minute before plugging it back in. Now, connect to the Internet and relaunch your HBO Max app.

SEE ALSO: How to Get HBO Max $9.99 Ad-Supported Subscription Plan

If those basic troubleshooting methods did not work, and HBO Max is still not working or you can’t play a title or video, try the solutions below.

Wait for HBO Max to Resolve Server Error

Unfortunately, there are times when the problem with HBO Max is on their end. If there is a temporary service outage on HBO Max servers, you cannot do anything but wait for them to fix it. It happens to everyone and not only in your case.

You can verify if there HBO Max server is down. Check their website or blogs for any news or updates from HBO Max. You can also check their official social media accounts for announcements. In most cases, HBO Max can fix the server error after several hours.

Turn Off Proxy Server or VPN Service on your Streaming Device

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It is common to use a proxy server or a VPN service if some content that you watch is not available in your region. However, your servers may also be the reason for trigger errors in HBO Max. You can try to disable your VPN or proxy server and check if it works.

  • To turn off the VPN on an Android device, go to Settings.
  • Select Network & Internet and go to VPN. Toggle it to Off.
  • For iOS devices, open Settings and select General.
  • Go to VPN and toggle the button to Not Connected.

Some VPN services are proven not to interfere with the HBO Max network system. Check out these leading providers if you need to try out and find a service that fits your streaming requirements.

Update your HBO Max App

Screenshot: Binge Gauge

Installing the latest updates on your HBO Max app will help resolve issues that may be causing the error. Software upgrades have fixes for bugs and reported problems from the previous version.

  • To update your HBO Max app, go to the Apps section of your device and look for HBO Max. Click Update.
  • For Android and iOS devices, go to the Google Play Store or App Store and search for HBO Max. Tap Update.

The last thing you can do if nothing happens and you still get the same error is to contact the HBO Max customer support team. Go to to get started.

SEE ALSO: How to Cancel HBO Max Subscription Account

What did you do to resolve your HBO Max service error code 100, 321 or 420? You can share your solution with us in the comment section below.

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Eddie Mendoza
Eddie Mendoza
With a Bachelor’s degree in IT, Eddie has a natural knack for troubleshooting gadget issues. With more than 10 years of blogging experience under his belt, writing and publishing articles for streaming and related services is one of his main act. When not on his computer, you can find him tinkering his guitars.



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