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So, you just need to install the latest version of Java to fix the JNI error without a second thought. That means a particular version of Java supports all files that require any previous version of Java.
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Doing so will immediately fix the problem. In other words, you just need to make sure your Java file and your system’s Java libraries are up to date and compatible with the version of Minecraft mod or server you have installed. Sometimes these errors also occur when the installation path of the Java files is broken. These errors usually occur when the Java files are too new or the Java version of your device is outdated. Such errors fall into the class of JNI or Java Native Interface errors. So, if you are using a Minecraft server, mods, or a feature that the library in your system doesn’t support, the game might end up facing an error. Minecraft Java and all its features depend upon the Java libraries on your computer to function properly.
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The "Could not find or load main class" error occurs when the JVM fails to load the main class. Install the Java SDK to identify and fix these errors What Causes Error: Could not find or load main class
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It usually occurs when executing a Java program from the command line. The Java “Could not find or load main class” error is thrown when the JVM fails to find or load the main class while executing a program.
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