Error a Jni Error Has Occurred Please Check Your Installation and Try Again Exception in Thread

Some Minecraft users are seeing an error whenever they attempt to launch the customer (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 once 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 8.i, Windows 10, and Windows eleven.

Every bit it turns out, in that location are multiple causes that might trigger this mistake when certain users effort to launch Minecraft and almost each of them is related to the Java installation.

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

Java 16 JDK is missing – If y'all become this error while attempting to launch Minecraft build 21w19 or newer, the first thing you should do is bank check if the Java 16 JDK installation is missing from your PC. This is the near popular reason why this error is encountered when launching Minecraft on PC. If the Java 16 JDK is missing from your computer installation, download and install information technology from the official channels.
Cleaved System Path for Java – Every bit it turns out, another reason why you lot can expect to come across this error is a scenario in which the system variable path for coffee is broken and tricks the Minecraft launcher into believing that Java is not installed on your PC when it really is. If this scenario is applicable, you lot should be able to ready the issue by removing the broken arrangement PATH variable from the Environment variables.

Install the latest Java JDK version

In almost documented cases, this particular error happens when yous attempt to launch Minecraft or a Minecraft server on a PC that doesn't have Java 16 or newer installed. Continue in listen that starting with Minecraft build 21w19, you will demand to have Java's xvi JDK version installed on your PC, otherwise, the game will not launch.

To fix this result, you lot volition simply need to update your current Java JDK to the nearly recent version available using the official channels.

If you're looking for stride by step instructions on how to exercise this, follow the guide below:

Ensure that the Minecraft launcher (Tlauncher or whatsoever other) is completely airtight before moving to the adjacent footstep below.
Open up your default browser and visit the download page of the Java 15 Development kit.
Once y'all're inside, make sure the Windows tab is selected, then roll all the way down to the Windows x64 Compressed annal and click on the acquaintance Download hyperlink.

Downloading the x65 compressed annal of the Coffee 16 JDK
At the confirmation prompt, check the box associated with I reviewed and have the Oracle Engineering Network License Agreement for Oracle Java SE, then click on the Download button below.
Expect until the download is complete, and so unpack the zip archive with WinZip, WinRar, 7Zip or the congenital-in equivalent and wait for the operation to consummate.

Unzip the Java JDK
Once the extraction procedure is complete, navigate to the location where y'all extracted the JDK and re-create information technology 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 sixteen folder that you previously copied:
```
C:\Plan Files\Coffee
```
Await until the copying operation is complete, then close the window and double-click on your Minecraft launcher once again (TLauncher or other).
Once you're within the launcher, click on the settings icon, then click on Settings from the context card.

Accessing the Settings card of the Minecraft launcher
Inside the Settings menu, ensure that the Minecraft Settings is selected at the tiptop, then click the Browse push associated with Java path.
Side by side, apply the browse window to navigate to the following location:
```
C:\Programme Files\Java\jdk-16.0.2\bin
```
In one case within, make sure that javaw.exe is selected earlier clicking the Open push button.
Finally, click on the Save button to successfully save the java path in your Minecraft launcher.
Launch the game normally and you should see the effect fixed.

If the problem is nonetheless not resolved, motility down to the adjacent potential fix beneath.

Remove the broken System Path variable for Java

If the first method was non effective in your case, the next thing yous should investigate is a potentially broken system variable used by Java.

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

In this case, yous tin get the issue resolved by accessing the System Properties screen and modifying the Surroundings variables in a way that the Java PATH environment is removed.

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

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

Note: The instructions beneath should work on every contempo Windows version including Windows 7, Windows viii.i, Windows ten, and Windows eleven.

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

Open up up the Organisation Properties window

Note: If you lot are prompted by the User Business relationship Control prompt, click Yes to grant admin access.
One time you're finally inside the Organisation Properties window, click on the Avant-garde tab, then click on Environs variables(under Startup and Recovery).

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

Editing the path variable
Next, one time you're inside the Edit environment variable window, go alee and look for an environment variable that mentions java.
One time you spot the culprit, click on it in one case to select it, then click Delete to get rid of it.

Deleting the coffee surroundings variable
One time the problematic environment variable has been deleted, reboot your PC, then start Minecraft again and see if the "A JNI error has occurred, please check your installation and try again" outcome is now fixed.