Most of them are related to the handling of JAR files on your setup.
The latest Java version has not been installed on your system.
The file path set for the Java executable is incorrect and points to the wrong location.
The default program for opening JAR files is not set.
Malware is on your setup.
Java on your rig for programs to run JAR files.
Furthermore, it should be the latest version released.
Here is the tutorial.
Step 2:Then navigate to the entry of Java and right-click it, then clickUninstall.
Step 3:Then go to the official Java website and download the latest version.
Run it to set up the latest version of Java after you download the executable.
reset your machine and find out if the Unable to Access Jarfile issue notification has been resolved.
Here are the steps.
Step 1:Navigate to the JAR files directory.
Right-click it and selectOpen withand choose the Java program.
Step 2:Then press theWindows+Ikeys to launch theSettingsapplication.
Now navigate toAppsand selectDefault appsfrom the left navigation bar.
Step 3:Now clickChoose default apps by file typepresent at the near bottom.
Now locate the entry .jar file and verify it is selected to be opened by Java.
Step 4:Then you should save changes and exit.
reboot your machine and peek if the unable to access jarfile issue notification is resolved.
Windows utility used by malware?
To know more information about this situation, you could read this post.
This can be really troublesome and will probably halt your task at hand.
You may have mistaken the file path, or you may have passed the wrong parameter to the function.
I really hope that this post can help you.
