A Jni Error Has Occurred

Some Minecraft users are seeing an error whenever they effort to launch the client (the game) or the server (.jar). The fault message that comes up is: "A JNI error has occurred, please bank check your installation and try again". This problem is generally reported to occur with version Minecraft version 21w19a and newer and it's confirmed to appear on Windows 7, Windows 8.one, Windows 10, and Windows 11.

As information technology turns out, there are multiple causes that might trigger this error when certain users attempt to launch Minecraft and almost each of them is related to the Java installation.

Hither's a list of possible culprits that are well-nigh likely responsible for causing the "A JNI error has occurred, please bank check your installation and try again":

Java 16 JDK is missing – If you become this error while attempting to launch Minecraft build 21w19 or newer, the beginning matter yous should do is bank check if the Java sixteen JDK installation is missing from your PC. This is the most popular reason why this error is encountered when launching Minecraft on PC. If the Coffee sixteen JDK is missing from your figurer installation, download and install it from the official channels.
Broken Organisation Path for Java – As it turns out, another reason why y'all tin can expect to run into this error is a scenario in which the system variable path for java is broken and tricks the Minecraft launcher into believing that Java is non installed on your PC when it actually is. If this scenario is applicable, y'all should exist able to fix the issue by removing the cleaved system PATH variable from the Environment variables.

Install the latest Java JDK version

In most documented cases, this particular error happens when you attempt to launch Minecraft or a Minecraft server on a PC that doesn't have Java 16 or newer installed. Keep in mind that starting with Minecraft build 21w19, you lot will need to have Java's sixteen JDK version installed on your PC, otherwise, the game will not launch.

To fix this event, you volition merely need to update your current Java JDK to the most recent version available using the official channels.

If you're looking for step past footstep instructions on how to do this, follow the guide below:

Ensure that the Minecraft launcher (Tlauncher or any other) is completely closed before moving to the next pace below.
Open your default browser and visit the download page of the Java 15 Development kit.
Once you're inside, brand sure the Windows tab is selected, so coil all the style down to the Windows x64 Compressed archive and click on the acquaintance Download hyperlink.

Downloading the x65 compressed archive of the Java sixteen JDK
At the confirmation prompt, check the box associated with I reviewed and accept the Oracle Engineering Network License Agreement for Oracle Java SE, then click on the Download button beneath.
Wait until the download is consummate, then unpack the zip archive with WinZip, WinRar, 7Zip or the built-in equivalent and wait for the operation to complete.

Unzip the Java JDK
Once the extraction process is consummate, navigate to the location where you extracted the JDK and re-create it on your clipboard by right-clicking on it and choosing Copy from the context bill of fare.
Next, utilize File Explorer (My Computer) to navigate to the following location and paste the JDK sixteen folder that you previously copied:
```
C:\Program Files\Java
```
Wait until the copying performance is consummate, then close the window and double-click on your Minecraft launcher one time over again (TLauncher or other).
Once you're inside the launcher, click on the settings icon, then click on Settings from the context menu.

Accessing the Settings menu of the Minecraft launcher
Inside the Settings menu, ensure that the Minecraft Settings is selected at the pinnacle, then click the Browse button associated with Java path.
Next, use the browse window to navigate to the following location:
```
C:\Program Files\Java\jdk-16.0.two\bin
```
Once inside, make certain that javaw.exe is selected before clicking the Open up button.
Finally, click on the Save button to successfully save the java path in your Minecraft launcher.
Launch the game normally and y'all should see the issue fixed.

If the problem is all the same not resolved, move down to the next potential fix below.

Remove the broken System Path variable for Java

If the offset method was not effective in your case, the next thing y'all should investigate is a potentially broken system variable used past Java.

A broken variable tin can be the determining factor in 'tricking' your Minecraft launcher into believing that the Java JDK requirement for the game is not installed when it actually is.

In this case, you can get the upshot resolved by accessing the System Properties screen and modifying the Surround variables in a way that the Coffee PATH environs is removed.

This fix has been confirmed to be effective for a lot of Minecraft users that nosotros're encountering the "A JNI error has occurred, please check your installation and try again" when attempting to launch the game from a dedicated launcher.

Follow the instructions beneath for a step-by-step guide that will guide you through the process of removing the corrupted Java JDK path variable:

Note: The instructions below should work on every recent Windows version including Windows 7, Windows 8.one, Windows 10, and Windows xi.

Printing Windows key + R to open up a Run dialog box. Next, type 'sysdm.cpl' within the text box and printing Enter to open the System Properties window.

Open up the System Properties window

Note: If you lot are prompted by the User Account Control prompt, click Yes to grant admin access.
Once you're finally within the Arrangement Properties window, click on the Advanced tab, so click on Environment variables(under Startup and Recovery).

Open up System Variables menu
Once you're inside the Organisation Variables window, go to Arrangement Variables, and then choose Path and click on Edit.

Editing the path variable
Next, in one case you're within the Edit environment variable window, go ahead and look for an environs variable that mentions java.
Once you lot spot the culprit, click on information technology once to select it, then click Delete to get rid of information technology.

Deleting the coffee surround variable
In one case the problematic environment variable has been deleted, reboot your PC, then start Minecraft once again and see if the "A JNI mistake has occurred, please bank check your installation and try again" issue is now stock-still.