Install latest available JRE 9 ea b78 (32-bit). Post install the verify install applet from:
https://www.java.com/en/download/uninstallapplet.jsp
generates NPE error message.
java.lang.NullPointerException
at sun.net.util.URLUtil.getConnectPermission(URLUtil.java:84)
at sun.awt.SunToolkit.checkPermissions(SunToolkit.java:879)
at sun.awt.SunToolkit.createImage(SunToolkit.java:745)
at sun.plugin2.uitoolkit.impl.awt.AWTAnimationPanel2.loadImage(Unknown Source)
at sun.plugin2.uitoolkit.impl.awt.AWTAnimationPanel2.preloadResources(Unknown Source)
at sun.plugin2.uitoolkit.impl.awt.AWTAnimationPanel2.doPaint(Unknown Source)
at sun.plugin2.uitoolkit.impl.awt.AWTAnimationPanel2.run(Unknown Source)
at java.lang.Thread.run(Thread.java:746)

Note: Checked this on Windows 7, IE 11 and Firefox (fresh JRE 9 ea b78 install). This seems a regression as the applet behave fine with JRE 8u60.
From the console log:
==================================================================
Java Plug-in 12.0.2 x86
Using JRE version 1.9.0-ea-b78 Java HotSpot(TM) Client VM
User home directory = C:\Users\.................
----------------------------------------------------
c: clear console window
f: finalize objects on finalization queue
g: garbage collect
h: display this help message
l: dump classloader list
m: print memory usage
o: trigger logging
q: hide console
r: reload policy configuration
s: dump system and deployment properties
t: dump thread list
v: dump thread stack
x: clear classloader cache
0-5: set trace level to <n>
----------------------------------------------------
AWTAnimationPanel.loadImage, cannot create image, caught: java.lang.NullPointerException
Ignored exception: java.lang.NullPointerException
JRT INFO: Running Java Removal Applet version: 2.0
JRT INFO: Browser: Unknown, user agent: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; SLCC2; .NET CLR

2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E; .NET CLR

1.1.4322; rv:11.0) like Gecko
JRT INFO: Java Scrub Version 2.0.0.0
JRT INFO: User does not have any old versions to be uninstalled
==========================================================