com.applandeo.materialcalendarview.CalendarView doesn't show up on XML design

Question

I have been trying to get CalendarView for the application i have been working on.Earlier the calendarView was being displayed in XML design but now i do not get any view and if i try to access the calenderID , my program stops working completely.

The following is the error displayed in XML file.

Failed to instantiate one or more classes The following class could not be initialised

java.lang.NullPointerException at com.applandeo.materialcalendarview.CalendarView.initUiElements(CalendarView.java:255) at com.applandeo.materialcalendarview.CalendarView.initControl(CalendarView.java:105) at com.applandeo.materialcalendarview.CalendarView.(CalendarView.java:74) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490) at org.jetbrains.android.uipreview.ViewLoader.createNewInstance(ViewLoader.java:339) at org.jetbrains.android.uipreview.ViewLoader.loadClass(ViewLoader.java:176) at org.jetbrains.android.uipreview.ViewLoader.loadView(ViewLoader.java:136) at com.android.tools.idea.rendering.LayoutlibCallbackImpl.loadView(LayoutlibCallbackImpl.java:301) at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:417) at android.view.BridgeInflater.loadCustomView(BridgeInflater.java:428) at android.view.BridgeInflater.createViewFromTag(BridgeInflater.java:332) at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:965) at android.view.LayoutInflater.rInflate_Original(LayoutInflater.java:1127) at android.view.LayoutInflater_Delegate.rInflate(LayoutInflater_Delegate.java:72) at android.view.LayoutInflater.rInflate(LayoutInflater.java:1101) at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:1088) at android.view.LayoutInflater.inflate(LayoutInflater.java:686) at android.view.LayoutInflater.inflate(LayoutInflater.java:505) at com.android.layoutlib.bridge.impl.RenderSessionImpl.inflate(RenderSessionImpl.java:363) at com.android.layoutlib.bridge.Bridge.createSession(Bridge.java:436) at com.android.tools.idea.layoutlib.LayoutLibrary.createSession(LayoutLibrary.java:121) at com.android.tools.idea.rendering.RenderTask.createRenderSession(RenderTask.java:739) at com.android.tools.idea.rendering.RenderTask.lambda$inflate$8(RenderTask.java:895) at com.android.tools.idea.rendering.RenderExecutor$runAsyncActionWithTimeout$2.run(RenderExecutor.kt:187) at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) at java.base/java.lang.Thread.run(Thread.java:829)