Resolution for the issue occurred while installing Java Extension via Studio/CMD.
While installing the Java extension via UiPath Studio or CMD prompt the installation was successful and the Successfully Installed Java extension pop-up was also shown, however, it displayed the Install button in the Tools section of Studio.
After Java 9, the extension must be configured to be loaded from the custom folder. For Java 8 and below it should work. For more details, see the warning from our official documentation: Extension for Java
In order for the installation to work without installation in the custom folder, update the UIAutomation package to version 22.4 or greater (our recommendation is to have the latest version of the package).
For more details related to the injection mechanism, consult the section from our official docs Injection mechanism .