Codename One Theme corrupted - ArrayIndexOutOfBoundsException: 0 - codenameone

Question

I've added a MutliImage using CodeName One Designer. I've added the image as a background of a component. Started getting an exception:
java.lang.ArrayIndexOutOfBoundsException: 0
at com.codename1.ui.util.Resources.readMultiImage(Resources.java:1096)
at com.codename1.ui.util.Resources.readMultiImage(Resources.java:1069)
at com.codename1.ui.util.Resources.createImage(Resources.java:1051)
at com.codename1.ui.util.Resources.createImage(Resources.java:961)
at com.codename1.ui.util.Resources.openFileImpl(Resources.java:306)
at com.codename1.ui.util.Resources.openFile(Resources.java:269)
at com.codename1.ui.util.Resources.<init>(Resources.java:189)
at com.codename1.ui.util.Resources.open(Resources.java:740)
at com.codename1.ui.util.Resources.openLayered(Resources.java:702)
at com.codename1.ui.util.Resources.openLayered(Resources.java:666)
at com.codename1.ui.plaf.UIManager.initNamedTheme(UIManager.java:1583)
at gymrush.pro.RushPro.init(RushPro.java:29)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.codename1.impl.javase.Executor$1$1.run(Executor.java:117)
at com.codename1.ui.Display.processSerialCalls(Display.java:1152)
at com.codename1.ui.Display.mainEDTLoop(Display.java:969)
at com.codename1.ui.RunnableWrapper.run(RunnableWrapper.java:120)
at com.codename1.impl.CodenameOneThread.run(CodenameOneThread.java:176)
java.io.IOException: 0
at com.codename1.ui.util.Resources.open(Resources.java:755)
at com.codename1.ui.util.Resources.openLayered(Resources.java:702)
at com.codename1.ui.util.Resources.openLayered(Resources.java:666)
at com.codename1.ui.plaf.UIManager.initNamedTheme(UIManager.java:1583)
at gymrush.pro.RushPro.init(RushPro.java:29)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.codename1.impl.javase.Executor$1$1.run(Executor.java:117)
at com.codename1.ui.Display.processSerialCalls(Display.java:1152)
at com.codename1.ui.Display.mainEDTLoop(Display.java:969)
at com.codename1.ui.RunnableWrapper.run(RunnableWrapper.java:120)
at com.codename1.impl.CodenameOneThread.run(CodenameOneThread.java:176)
I've removed the image and the style, nothing helps. Even created a new theme and removed the old one, same problem. Also tried to use:
public void init(Object context) {
theme = UIManager.initNamedTheme("/theme", "rush-pro");
}
No luck here. I would rebuild the theme from scratch and start again, but how can I do this without starting a new project?
Maybe there is better way to solve the problem?