When trying to stream content from Hulu, customers on Windows, Linux, and macOS sometimes get the error number DRMCDM78. Users who are experiencing this issue say it occurs whenever they try to view any content on Hulu.
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Method 1: Hulu Server Health Checking
Make sure Hulu isn’t experiencing server issues before continuing with this troubleshooting effort. If that’s the case, you have no say in the matter.
Use a third-party tool like Outage Report, Down Detector, or IsItDownRightNow to see if other users in your area are experiencing the same issue.
If you have just found evidence that other customers around the world are reporting the same error, you may want to see if Hulu has made any official announcements about the health of their streaming server.
If your troubleshooting has not uncovered a problem on the server end, then it is likely that the issue is localised to the user’s browser or network. For guidance on how to deal with these concerns, please refer to the techniques listed below.
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Method 2: Modifying to the Most Recent Browser Version
If you’ve already checked for and eliminated a Hulu server issue, the issue is likely with your browser. Most cases of the DRMCDM78 problem can be traced back to using an old browser version.
There’s a good chance that your router just sent out a change to its repository that breaks several streaming services until you update to the most recent release. Naturally, this procedure will vary based on the browser you’re utilising at the moment.
If you’re using Chrome on any of those operating systems and want to ensure you’re always running the most recent version, follow subguide A. In the same vein, any browser that is based on Chromium will work just fine (the steps are exactly the same).
However, if you’re using Firefox (one of the few 3rd party browsers that isn’t based on Chromium), then you need use sub-guide B to force it to upgrade to the most recent version.
1: Changes in the New Version of Google Chrome
MacOS and Windows
Step 1: Launch Chrome and tap the menu icon (three dots) in the upper-right corner.
Step 2: Select Help > About Google Chrome from the drop-down menu that just appears.
Step 3: The tool will immediately begin checking for updates in the About Google Chrome section. When the installer download is complete, you will be invited to instal any available updates.
Step 4: When the updated version is installed, your browser will relaunch itself immediately. If this happens, just go back to Hulu and do whatever it was you were doing before that led to the DRMCDM78 issue in the first place.
Linux
Step 1: To update your browser, launch a Terminal session on your Linux machine and enter the following command.
sudo apt update
Step 2: You should press Y when prompted to confirm the procedure and then wait for it to finish.
Step 3: When the appropriate Google repository has been loaded, use the following command and hit Enter to instal Google Chrome:
sudo apt-get –only-upgrade install google-chrome-stable
Step 4: Launch Google Chrome and Hulu once the installation is finished to check if the issue persists.
Updating Mozilla Firefox
Microsoft Windows and Apple’s MacOS
Step 1: Launch Mozilla Firefox and select Options from the main menu by clicking the action button in the browser’s upper right corner. When the context menu appears, select Help, and then select About Firefox.
Step 2: Then, from the About Mozilla Firefox menu, select Restart and update the Firefox (if it exists) and wait for the update to instal.
Step 3: The browser will restart itself automatically. Once it does, try accessing Hulu again to see if you’re still getting an error message.
Linux
To upgrade to the most recent version of Firefox, open a Terminal window and enter the following command on Ubuntu or Debian Linux:
$ sudo apt-get update
$ sudo apt-get install firefox
Instead of manually entering these commands, use the yum tool or a graphical user interface (GUI) tool if you’re working with Fedora, Redhat, or CentOS.
# yum update
# yum update firefox
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Method 3: Cleaning Your Web Browser’s Cache
If the above steps did not work, the issue may be the result of corrupted data in your browser’s cache.
A couple of people who had problems with Hulu and the DRMCDM78 error have reported that clearing their browser cache fixed the problem.
The specific actions required to purge your browser’s cache will vary, of course, depending on the browser you’re using. Given this, we’ve compiled a quick reference on how to flush the cache in the most widely used Windows browsers.
Don’t worry; none of these actions will cause your browser’s saved private information to be erased, so there’s no need to back up your files first. The one drawback is that you will be signed out of any websites you are currently logged into.
