Error: a Jni Error Has Occurred

Some Minecraft users are seeing an mistake whenever they try to launch the customer (the game) or the server (.jar). The error message that comes upwardly is: "A JNI error has occurred, delight check your installation and try once more". This problem is mostly reported to occur with version Minecraft version 21w19a and newer and it's confirmed to announced on Windows 7, Windows 8.1, Windows ten, and Windows 11.

As it 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.

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

Java 16 JDK is missing – If you get this fault while attempting to launch Minecraft build 21w19 or newer, the first thing you should do is cheque if the Java sixteen JDK installation is missing from your PC. This is the almost popular reason why this error is encountered when launching Minecraft on PC. If the Java xvi JDK is missing from your computer installation, download and install information technology from the official channels.
Broken System Path for Java – Every bit it turns out, some other reason why you tin can expect to see this error is a scenario in which the system variable path for coffee is broken and tricks the Minecraft launcher into believing that Coffee is not installed on your PC when information technology actually is. If this scenario is applicative, you should be able to gear up the issue by removing the broken organization PATH variable from the Environment variables.

Install the latest Coffee JDK version

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

To fix this effect, y'all volition simply need to update your current Java JDK to the about contempo version available using the official channels.

If you're looking for footstep past stride instructions on how to practise this, follow the guide beneath:

Ensure that the Minecraft launcher (Tlauncher or any other) is completely closed before moving to the adjacent pace below.
Open your default browser and visit the download folio of the Java 15 Development kit.
One time y'all're inside, make sure the Windows tab is selected, so whorl all the fashion downwards to the Windows x64 Compressed archive and click on the acquaintance Download hyperlink.

Downloading the x65 compressed archive of the Java 16 JDK
At the confirmation prompt, check the box associated with I reviewed and accept the Oracle Technology Network License Agreement for Oracle Java SE, then click on the Download push below.
Wait until the download is complete, then unpack the null annal with WinZip, WinRar, 7Zip or the built-in equivalent and wait for the functioning to complete.

Unzip the Java JDK
Once the extraction process is complete, navigate to the location where you lot extracted the JDK and copy it on your clipboard by right-clicking on it and choosing Re-create from the context bill of fare.
Next, use File Explorer (My Computer) to navigate to the following location and paste the JDK 16 folder that yous previously copied:
```
C:\Program Files\Coffee
```
Wait until the copying operation is consummate, then close the window and double-click on your Minecraft launcher once over again (TLauncher or other).
Once you're inside the launcher, click on the settings icon, and so click on Settings from the context menu.

Accessing the Settings menu of the Minecraft launcher
Inside the Settings carte, ensure that the Minecraft Settings is selected at the top, then click the Browse button associated with Java path.
Next, apply the browse window to navigate to the following location:
```
C:\Program Files\Java\jdk-sixteen.0.2\bin
```
Once inside, make certain that javaw.exe is selected before clicking the Open up push.
Finally, click on the Save button to successfully relieve the java path in your Minecraft launcher.
Launch the game normally and yous should see the issue fixed.

If the problem is nevertheless non resolved, move down to the next potential fix below.

Remove the cleaved System Path variable for Coffee

If the showtime method was not effective in your case, the side by side matter you should investigate is a potentially broken system variable used by Java.

A cleaved variable can be the determining factor in 'tricking' your Minecraft launcher into believing that the Coffee JDK requirement for the game is non installed when information technology really is.

In this case, you can become the outcome resolved by accessing the System Backdrop screen and modifying the Environment variables in a style that the Java PATH surroundings is removed.

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

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

Note: The instructions below should work on every contempo Windows version including Windows 7, Windows 8.1, Windows ten, and Windows 11.

Press Windows primal + R to open up upward a Run dialog box. Next, type 'sysdm.cpl' inside the text box and press Enter to open up up the System Properties window.

Open up the System Properties window

Note: If you are prompted past the User Account Control prompt, click Yes to grant admin admission.
Once you're finally within the System Properties window, click on the Advanced tab, then click on Surround variables(nether Startup and Recovery).

Open up System Variables carte du jour
Once you're inside the System Variables window, go to System Variables, then cull Path and click on Edit.

Editing the path variable
Next, once you lot're inside the Edit surround variable window, go ahead and look for an environment variable that mentions java.
Once you spot the culprit, click on it one time to select it, and so click Delete to get rid of it.

Deleting the java surround variable
One time the problematic surroundings variable has been deleted, reboot your PC, so outset Minecraft again and encounter if the "A JNI error has occurred, please check your installation and try again" event is now stock-still.