Resolved Client.viewportWidth

Runemate version 2.1.8

Code (Text):

1. [SDK Debug] Unable to resolve the class component of Client.viewportWidth
2. [SDK Debug] Unable to resolve the field component of Client.viewportWidth
3. java.rmi.RemoteException: Unable to reflect Client.viewportWidth; nested exception is:
4.     java.lang.ClassNotFoundException: Client
5.     at aux.IiIiIIIiIi.long(mc:758)
6.     at aux.IiIiIIIiIi.long(mc:428)
7.     at aux.IiIiIIIiIi.int32(mc:907)
8.     at sun.reflect.GeneratedMethodAccessor28.invoke(Unknown Source)
9.     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
10.     at java.lang.reflect.Method.invoke(Method.java:601)
11.     at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:322)
12.     at sun.rmi.transport.Transport$1.run(Transport.java:177)
13.     at sun.rmi.transport.Transport$1.run(Transport.java:174)
14.     at java.security.AccessController.doPrivileged(Native Method)
15.     at sun.rmi.transport.Transport.serviceCall(Transport.java:173)
16.     at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:553)
17.     at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:808)
18.     at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:667)
19.     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
20.     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
21.     at java.lang.Thread.run(Thread.java:722)
22. Caused by: java.lang.ClassNotFoundException: Client
23.     at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
24.     at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
25.     at java.security.AccessController.doPrivileged(Native Method)
26.     at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
27.     at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
28.     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
29.     at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
30.     at app.u.loadClass(u.java:79)
31.     at java.lang.ClassLoader.findSystemClass(ClassLoader.java:1050)
32.     at b.a(b.java:20)
33.     at h.a(h.java:31)
34.     at b.findClass(b.java:31)
35.     at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
36.     at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
37.     at java.lang.Class.forName0(Native Method)
38.     at java.lang.Class.forName(Class.java:264)
39.     at aux.IiIiIIIiIi.long(mc:897)
40.     at aux.IiIiIIIiIi.long(mc:704)
41.     ... 16 more

Not quite sure what is the cause of this, any help would be appreciated.