Mesquite_Start_Script command not working on Mac OS 10.14.6 Mojave

[santiak]

When trying to run the script, the following message is displayed in terminal:

Last login: Thu Jan 2 16:15:29 on ttys001
Santiagos-iMac-2:~ santiagoron$ /Applications/Mesquite_Folder/Mesquite_Start_Script.command ; exit;
Exception in thread "main" java.lang.UnsupportedClassVersionError: start/Mesquite : Unsupported major.minor version 52.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637)
at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
logout
Saving session...
...copying shared history...
...saving history...truncating history files...
...completed.

The script file is the same as provided in the installation. The script is located in the Mesquite directory (see attached). Mesquite version is the last one (3.61)