SwitchLogInfoDialog NullPointerException: 'getResources()' on a null object reference

[galadril]

java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.content.Context.getResources()' on a null object reference
    at com.afollestad.materialdialogs.util.DialogUtils.getColor(DialogUtils.java:113)
    at com.afollestad.materialdialogs.MaterialDialog$Builder.<init>(MaterialDialog.java:483)
    at nl.hnogames.domoticz.UI.SwitchLogInfoDialog.<init>(SwitchLogInfoDialog.java:50)
    at nl.hnogames.domoticz.Fragments.Switches.showLogDialog(Switches.java:233)
    at nl.hnogames.domoticz.Fragments.Switches.access$500(Switches.java:68)
    at nl.hnogames.domoticz.Fragments.Switches$5.onReceiveSwitches(Switches.java:304)
    at nl.hnogames.domoticz.Domoticz.SwitchLogParser.parseResult(SwitchLogParser.java:58)
    at nl.hnogames.domoticz.Utils.RequestUtil$7.onResponse(RequestUtil.java:223)
    at nl.hnogames.domoticz.Utils.RequestUtil$7.onResponse(RequestUtil.java:213)
    at com.android.volley.toolbox.JsonRequest.deliverResponse(JsonRequest.java:65)
    at com.android.volley.ExecutorDelivery$ResponseDeliveryRunnable.run(ExecutorDelivery.java:99)
    at android.os.Handler.handleCallback(Handler.java:739)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:135)
    at android.app.ActivityThread.main(ActivityThread.java:5294)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:372)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:904)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:699)