Jiglu uses the Java 21 platform. Either OpenJDK or the Oracle JRE will work fine depending on your preference, though OpenJDK will already come with most Linux distributions.
On OpenSuse use:
zypper install java-21-openjdk java-21-openjdk-headless
On Amazon Linux instead use:
yum installjava-21-amazon-correttojava-21-amazon-corretto-headless
If Java was already installed you may need to check the correct JRE is set as the default:
update-alternatives --config java