Android - Failed to sign APK package: Unsupported major.minor version 52.0 {SOLVED}

I am trying to build my apk in Unity (2017.3.0f3) but I get the error Unsupported major.minor version 52.0. I have read elsewhere that to fix this download Java JDK 8 and select the path. I have done this with different version of Java 8 and none of them are working. I have tried updating all my android SDK packages but Unity wont build on the latest SDK tools so I had to replace them with the Revision 25.2.5 (January 2017) tools as specified in the following unity answers page:

https://answers.unity.com/questions/1323731/unable-to-list-target-platforms-please-make-sure-t.html

I am at a loss now, any advice is appreciated. Thanks

Current settings:

Error log:

 CommandInvokationFailure: Failed to sign APK package.
 C:\Users\Jack\AppData\Local\Android\Sdk\build-tools\27.0.3\apksigner.bat sign --ks "E:/JRFApplications/Keystore/jrfapplications_2018.keystore" --ks-pass stdin  --ks-key-alias "eggscapade" --key-pass stdin  "E:\JRFApplications\Apps\Egg\Temp/StagingArea/Package.apk"
 
 stderr[
 java.lang.UnsupportedClassVersionError: com/android/apksigner/ApkSignerTool : Unsupported major.minor version 52.0
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:800)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
     at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:412)
     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
     at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:482)
 Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8
 Exception in thread "main" 
 ]
 stdout[
 
 ]
 exit code: 1
 UnityEditor.Android.Command.WaitForProgramToRun (UnityEditor.Utils.Program p, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg)
 UnityEditor.Android.Command.RunWithStdin (System.Diagnostics.ProcessStartInfo psi, UnityEditor.Android.WaitingForProcessToExit waitingForProcessToExit, System.String errorMsg, System.String[] input)
 UnityEditor.Android.PostProcessor.Tasks.TasksCommon.Exec (System.String command, System.String args, System.String workingdir, System.String errorMsg, System.String[] stdin)
 UnityEditor.Android.PostProcessor.Tasks.BuildAPK.SignPackage (UnityEditor.Android.PostProcessor.PostProcessorContext context)
 UnityEditor.Android.PostProcessor.Tasks.BuildAPK.Execute (UnityEditor.Android.PostProcessor.PostProcessorContext context)
 UnityEditor.Android.PostProcessor.PostProcessRunner.RunAllTasks (UnityEditor.Android.PostProcessor.PostProcessorContext context)
 UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

Versions of JDK installed and tested without success: