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 most likely responsible for causing the “A JNI error has occurred, please check your installation and try again”:
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 will need to have Java’s 16 JDK version installed on your PC, otherwise, the game will not launch. To fix this issue, you will simply need to update your current Java JDK to the most recent version available using the official channels. If you’re looking for step by step instructions on how to do this, follow the guide below: If the problem is still not resolved, move down to the next potential fix below.
Remove the broken System Path variable for Java
If the first method was not effective in your case, the next thing you 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 believing that the Java JDK requirement for the game is not installed when it actually is. In this case, you can get the issue resolved by accessing the System Properties screen and modifying the Environment variables in a way 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 error 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 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 8.1, Windows 10, and Windows 11.
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