You have Java 11+ installed, or only a JRE. Fix: Install JDK 8 (e.g., from Adoptium’s Eclipse Temurin archive) and set JAVA_HOME environment variable to point to it before rerunning the installer.
Once the download ( TIBCO_Jaspersoft_Studio_6.6.0_windows_x86_64.exe ) is complete: download jaspersoft studio 6.6.0
: You can find the latest releases and community projects on the Jaspersoft Community Downloads page. You have Java 11+ installed, or only a JRE
-Xms512m -Xmx2048m