I have the same problem on a windows server 2022 64 bit
During installation there is an error
Problem running post-install step. Installation may not complete correctly
Error running D:\ISA\jasperreports-server-9.0.0/buildomatic/js-ant.bat import-minimal-pro: [exec] Execute failed: java.io.IOException: Cannot run program "git" (in directory "D:\ISA\jasperreports-server-9.0.0\buildomatic"): CreateProcess error=2, The system cannot find the file specified
[copy] Warning: Could not find file D:\ISA\jasperreports-server-9.0.0\buildomatic\conf_source\templates\keystore-configuration.xml to copy.
BUILD FAILED
..
D:\ISA\jasperreports-server-9.0.0\buildomatic\bin\app-server.xml:42: java.lang.UnsupportedClassVersionError: org/openjdk/nashorn/api/scripting/NashornScriptEngineFactory has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
The settings of JAVA_HOME are correct - I checked this.
C:\Windows\System>java -version
java version "17.0.9" 2023-10-17 LTS
Java(TM) SE Runtime Environment (build 17.0.9+11-LTS-201)
Java HotSpot(TM) 64-Bit Server VM (build 17.0.9+11-LTS-201, mixed mode, sharing)