Thread: [PI] Client Freeze [Lunar] When i click Spell book??

i get this error when i click the spell book after i change to lunar Spells

Code:

Exception in thread "Thread-5" java.lang.NullPointerException
        at client.drawInterface(client.java:8274)
        at client.drawTabArea(client.java:1893)
        at client.drawGameScreen(client.java:8149)
        at client.processDrawing(client.java:8897)
        at RSApplet.run(RSApplet.java:108)
        at client.run(client.java:4686)
        at java.lang.Thread.run(Unknown Source)