java.lang.UnsupportedClassVersionError: com/github/rjeschke/txtmark/Decorator : Unsupported major.minor version 51.0
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)
at net.mightypork.rpw.App.init(App.java:108)
at net.mightypork.rpw.App.start(App.java:61)
at net.mightypork.rpw.App.main(App.java:55)
FULL LOG
[ i ] Main logger initialized.
[ i ] 2017/08/29 16:10:27
[ i ] ResourcePack Workbench v.4.3.1 (#431)
[ # ] Init started...
[ - ] Checking Minecraft installation.
[ - ] Checking working directory.
[ - ] Initializing configuration manager.
[ ] Last run version: 4.3.1 (#431)
[ i ] Using library version: UNKNOWN
[!E!] Unhandled error, opening error screen.
[!E!] java.lang.UnsupportedClassVersionError: com/github/rjeschke/txtmark/Decorator : Unsupported major.minor version 51.0
[!E!] at java.lang.ClassLoader.defineClass1(Native Method)
[!E!] at java.lang.ClassLoader.defineClassCond(ClassLoader.java:637)
[!E!] at java.lang.ClassLoader.defineClass(ClassLoader.java:621)
[!E!] at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
[!E!] at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
[!E!] at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
[!E!] at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
[!E!] at java.security.AccessController.doPrivileged(Native Method)
[!E!] at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
[!E!] at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
[!E!] at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
[!E!] at java.lang.ClassLoader.loadClass(ClassLoader.java:247)
[!E!] at net.mightypork.rpw.App.init(App.java:108)
[!E!] at net.mightypork.rpw.App.start(App.java:61)
[!E!] at net.mightypork.rpw.App.main(App.java:55)
[!E!]
RPW 4.3.1 CRASH REPORT
Please, report this issue on GitHub (use the button below). If possible, include THIS WHOLE LOG in the report.
Alternatively, you can send this log to MightyPork. E-mail: ondra@ondrovo.com
SYSTEM INFO
STACK TRACE
FULL LOG