MCreator error

:cleanCache
:clean UP-TO-DATE
:deobfCompileDummyTask
:deobfProvidedDummyTask
:getVersionJson
:extractUserdev
:extractDependencyATs SKIPPED
:extractmcpData
:extractMcpMappings
:genSrgs
:downloadClient
:downloadServer
:mergeJars
:deobfMcSRG
Applying SpecialSource
Applying Exceptor
:decompileMC
:fixMcSources
:applySourcePatches
:remapMcSources
:recompileMc FAILED
FAILURE: Build failed with an exception
* what went wrong:
Execution failed for task `:recompileMc`.
> Unable to find a javac compiler
  com.sun.tools.javac.Main is not on the classpath
  Perhaps JAVA_HOME does not point to the JDK.
  It is currently set to /usr/lib/jvm/java-8-openjdk-amd64/jre
* Try
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.