JasperReports Server versions must align closely with the Jaspersoft Studio version used to design the reports. If your organization utilizes a production server running JasperReports Server 6.6.x, designing layouts in newer versions can introduce incompatible XML tags that break server-side compilation.
In the same Jaspersoft Studio.ini file, increase the memory allocation variables: -Xms512m -Xmx2048m Use code with caution. jaspersoft studio 660 download link
If your server is on JasperReports Server 6.4–6.7, you use Studio 6.6.0 or 6.7.0. However, if you have flexibility, consider upgrading both server and studio to a supported version. JasperReports Server versions must align closely with the
Windows 7/8/10, macOS (Intel chips natively; requires Rosetta 2 on Apple Silicon M-series), mainstream Linux distributions. Step-by-Step Installation Guide Windows Installation Download the .exe file from the link above. Double-click the installer to launch the setup wizard. Accept the license agreement. If your server is on JasperReports Server 6
https://sourceforge.net/projects/jasperstudio/files/archive/JaspersoftStudio-6.6.0/