A Jni Error Has Occurred

Some Minecraft users are seeing an fault whenever they attempt to launch the client (the game) or the server (.jar). The error message that comes upwardly is: "A JNI error has occurred, please check your installation and try again". This problem is mostly reported to occur with version Minecraft version 21w19a and newer and it's confirmed to appear on Windows 7, Windows eight.1, Windows 10, and Windows 11.

Equally it turns out, at that place are multiple causes that might trigger this error when sure 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 about likely responsible for causing the "A JNI error has occurred, please bank check your installation and try again":

Coffee sixteen JDK is missing – If you become this error while attempting to launch Minecraft build 21w19 or newer, the first affair you should exercise is bank check if the Coffee 16 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 Java 16 JDK is missing from your calculator installation, download and install information technology from the official channels.
Broken System Path for Java – As information technology turns out, another reason why yous can expect to see this error is a scenario in which the organization variable path for java is broken and tricks the Minecraft launcher into believing that Coffee is not installed on your PC when information technology really is. If this scenario is applicable, you should be able to ready the issue by removing the cleaved arrangement PATH variable from the Environment variables.

Install the latest Coffee JDK version

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

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

If you're looking for pace by step instructions on how to practise this, follow the guide beneath:

Ensure that the Minecraft launcher (Tlauncher or whatever other) is completely closed before moving to the next stride beneath.
Open up your default browser and visit the download page of the Coffee 15 Evolution kit.
Once y'all're inside, brand sure the Windows tab is selected, so scroll all the style downwardly to the Windows x64 Compressed archive and click on the acquaintance Download hyperlink.

Downloading the x65 compressed annal of the Java xvi JDK
At the confirmation prompt, check the box associated with I reviewed and accept the Oracle Engineering Network License Understanding for Oracle Java SE, so click on the Download button below.
Wait until the download is complete, then unpack the zip archive with WinZip, WinRar, 7Zip or the congenital-in equivalent and await for the functioning to complete.

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

Accessing the Settings menu of the Minecraft launcher
Within the Settings menu, ensure that the Minecraft Settings is selected at the top, 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.ii\bin
```
In one case inside, make sure that javaw.exe is selected before clicking the Open push.
Finally, click on the Save button to successfully relieve the java path in your Minecraft launcher.
Launch the game normally and you should see the event stock-still.

If the problem is still non resolved, movement down to the next potential fix below.

Remove the broken Organisation Path variable for Java

If the first method was not effective in your case, the next matter you should investigate is a potentially broken system variable used by Coffee.

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

In this instance, you lot tin can get the event resolved by accessing the System Properties screen and modifying the Environment variables in a mode that the Java PATH environment is removed.

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

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

Annotation: The instructions below should work on every recent Windows version including Windows vii, Windows 8.1, Windows 10, and Windows eleven.

Press Windows fundamental + R to open a Run dialog box. Side by side, type 'sysdm.cpl' inside the text box and printing Enter to open the Organisation Properties window.

Open upward the System Properties window

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

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

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

Deleting the java surroundings variable
Once the problematic environment variable has been deleted, reboot your PC, then commencement Minecraft again and come across if the "A JNI mistake has occurred, delight check your installation and try again" effect is at present fixed.