framework error

[Haibi04]

!ENTRY org.eclipse.wst.web.ui 4 0 2018-07-05 10:24:24.526
!MESSAGE FrameworkEvent ERROR
!STACK 0
org.osgi.framework.BundleException: Could not resolve module: org.eclipse.wst.web.ui [922]

I can't solve the problem, could you help me? and I also have the problem at
package cn.ieclipse.smartim.common.Notifications

public Notifications(Display display, int style) {
super(display, style);
try {
Class<?> clazz = Class.forName("org.eclipse.swt.internal.win32.OS");
if (clazz != null) {
long top = clazz.getField("HWND_TOPMOST").getLong(null);
Method m = clazz.getMethod("SetWindowPos", long.class,
long.class, int.class, int.class, int.class, int.class,
int.class);
m.invoke(null, this.handle, top, 0, 0, 0, 0, 0);

the handle cannot be resolved or is not a field.

[Haibi04]

Eclipse 4.7 for Mac OS X

[Jamling]

The notification alwasys top feature is only works for Windows platform.

I don't known why your max os has org.eclipse.swt.internal.win32.OS class, and the exception will catched to consumed.

org.eclipse.wst.web.ui can't be resoved, maybe you need to re-install eclipse for mac os version.