Fix Failed To Download File, The File Contents Differ From What Was Expected.

When it comes to online sandbox games, Minecraft is right up there. Available on Windows, Linux, and macOS, among other popular OSes.

The Java programming language is responsible for the creation and operation of this game. Users, however, have encountered issues with the jna-4.4.0.jar file.

The Minecraft launcher displays an error message. This tutorial will explain the Minecraft jna-4.4.0.jar error and provide instructions for resolving it.

Failed To Download File, The File Contents Differ From What Was Expected.

How to Fix “Failed to Download File, the File Contents Differ” Error?

If your computer’s firewall is blocking Minecraft from running, you will see the “Failed To Download File, The File Contents Differ From What Was Expected.” error message. Further, the issue at hand could be brought on by a faulty Minecraft file or mods.

When a user runs the Minecraft Launcher, they may get the following message (which may also appear after installing a mod):

Fix 1 – Shut Down and Restart

You should look for a basic solution to your problem first. You can finish the procedure by turning off your smartphone and turning it back on.

The “Minecraft Fails to Download File” problem could disappear after a device restart. When that fails, move on to the next option.

Fix 2 – Make Sure Your Minecraft Application is Updated

You may be experiencing this issue because you are using an old version of the game, as was previously mentioned.

The game crashes frequently, and there are a wide variety of errors because the old version isn’t compatible with Windows. The error can be fixed by installing the most recent update.

Here are the measures to take:

Step 1: Choose the drop-down box that reads “Options” next to your username on the launcher’s main screen.

Step 2: Then, hit the button labelled “Force Update”

Step 3: Put the new update into your system.

Since the upgrade was successfully obtained and implemented.

Fix 3 – Try Replacing the .jar File

Here, the downloaded files won’t be built properly and will start producing incompatibilities if Java or the JDK isn’t specified as the default programme for opening the.Jar file extensions.

Step 1: If an error occurs, right-click the message and select “Copy.”

Step 2: When the link shows in the address bar, copy it.

Step 3: Launch your chosen browser, paste the copied URL into the address bar, and hit Enter.

Step 4: The download of the file will begin immediately.

Step 5: Find the file you just downloaded in your computer’s Downloads folder and then press Ctrl + C.

Step 6: The location of the error log file will change depending on the user’s configuration.

Fix 6 – Turn off the Antivirus Software

It’s not uncommon for security software to cause gameplay issues. The game’s ability to function is hampered, and the game files may become corrupted or otherwise malfunction.

Therefore, temporarily disabling your antivirus programme is required to determine if the file can be downloaded without the issue. If turning off antivirus software doesn’t work, try a new piece of antivirus software, get in touch with the antivirus help centre, or add the game to the list of executables.


Many players have encountered the “Failed To Download File, The File Contents Differ From What Was Expected.” error message upon attempting to open Minecraft.

Fortunately, many players were able to resolve the issue by reverting to a previous version of the game’s.jar file and then replacing it with the updated version.

Discover the most effective solutions to this Minecraft problem here. Playing Minecraft is a fun time for anyone. For a long time now, this game has been captivating users. However, similar to other games, this one has its share of issues.