Java Authenticator a Jni Error Has Occurred Please Check Your Installation and Try Again

Some Minecraft users are seeing an mistake whenever they attempt to launch the client (the game) or the server (.jar). The error message that comes up is: "A JNI error has occurred, please bank check your installation and try again". This problem is mostly reported to occur with version Minecraft version 21w19a and newer and information technology's confirmed to appear on Windows 7, Windows 8.ane, Windows ten, and Windows eleven.

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

Hither'south a list of possible culprits that are most likely responsible for causing the "A JNI fault has occurred, please check your installation and try again":

Java sixteen JDK is missing – If you become this mistake while attempting to launch Minecraft build 21w19 or newer, the beginning thing yous should do is cheque if the Java 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 sixteen JDK is missing from your computer installation, download and install information technology from the official channels.
Broken Arrangement Path for Java – Every bit it turns out, another reason why you tin expect to see this error is a scenario in which the system variable path for coffee is cleaved and tricks the Minecraft launcher into believing that Coffee is non installed on your PC when it actually is. If this scenario is applicable, yous should be able to fix the event by removing the broken system PATH variable from the Environs variables.

Install the latest Java JDK version

In nigh documented cases, this particular error happens when you attempt to launch Minecraft or a Minecraft server on a PC that doesn't take Coffee 16 or newer installed. Continue in mind that starting with Minecraft build 21w19, you will need to accept Java'due south xvi JDK version installed on your PC, otherwise, the game will not launch.

To fix this event, you will only demand to update your current Java JDK to the nigh recent version available using the official channels.

If you lot're looking for footstep by step instructions on how to do this, follow the guide beneath:

Ensure that the Minecraft launcher (Tlauncher or any other) is completely closed before moving to the next step below.
Open up your default browser and visit the download page of the Java xv Development kit.
Once you're inside, brand sure the Windows tab is selected, and then scroll all the way down to the Windows x64 Compressed annal and click on the associate Download hyperlink.

Downloading the x65 compressed annal 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, and then 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 wait for the functioning to complete.

Unzip the Java JDK
In one case the extraction process is complete, navigate to the location where you extracted the JDK and copy it on your clipboard past right-clicking on it and choosing Copy from the context menu.
Next, employ File Explorer (My Estimator) to navigate to the following location and paste the JDK 16 folder that y'all previously copied:
```
C:\Program Files\Java
```
Expect until the copying operation is complete, and then close the window and double-click on your Minecraft launcher one time again (TLauncher or other).
Once you're within the launcher, click on the settings icon, so click on Settings from the context menu.

Accessing the Settings card of the Minecraft launcher
Within the Settings menu, ensure that the Minecraft Settings is selected at the superlative, then click the Scan push associated with Coffee path.
Next, use the browse window to navigate to the following location:
```
C:\Program Files\Java\jdk-16.0.two\bin
```
Once inside, make sure that javaw.exe is selected before clicking the Open push.
Finally, click on the Save button to successfully save the java path in your Minecraft launcher.
Launch the game unremarkably and you should meet the outcome stock-still.

If the problem is notwithstanding not resolved, move downwardly to the next potential fix below.

Remove the cleaved System Path variable for Java

If the commencement method was not effective in your case, the adjacent affair you should investigate is a potentially cleaved system variable used past Java.

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

In this case, yous can get the effect resolved by accessing the Organisation Properties screen and modifying the Environment variables in a way that the Java PATH surround is removed.

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

Follow the instructions below for a step-by-footstep guide that will guide y'all through the process of removing the corrupted Coffee JDK path variable:

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

Press Windows key + R to open up a Run dialog box. Adjacent, type 'sysdm.cpl' inside the text box and printing Enter to open up up the Organization Properties window.

Open up upwardly the System Properties window

Note: If yous are prompted by the User Account Control prompt, click Yes to grant admin admission.
In one case yous're finally inside the Organization Properties window, click on the Advanced tab, then click on Surround variables(under Startup and Recovery).

Open Organization Variables menu
In one case you lot're within the System Variables window, become to System Variables, then choose Path and click on Edit.

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

Deleting the java environs variable
Once the problematic environment variable has been deleted, reboot your PC, then start Minecraft again and come across if the "A JNI error has occurred, please bank check your installation and attempt once again" issue is now fixed.