Application Crashing

[pcsaunak]

As soon as I try to submit any thing it crashes, for example, when the app first starts up, it asks for password. When I type the password for the second time it crashes. with the below error

android.view.WindowManager$BadTokenException: Unable to add window -- token null is not valid; is your activity running?

the same thing happens if I try to open the app again ,it navigates from splash screen to the home screen where I need to add my expense. As soon as I enter the number and hit the "Ok" button on the soft keyboard the app crashes . Here is the complete crash log. Tried running the app on android 8 and android 7 but the same. I did update the app a bit so that I could compile it in the latest android studio version. Also updated the "@LinkView" of butterknife to "@BindView"

05-30 02:38:04.303 29347-29347/com.nightonke.cocoin E/AndroidRuntime: FATAL EXCEPTION: main Process: com.nightonke.cocoin, PID: 29347 android.view.WindowManager$BadTokenException: Unable to add window -- token null is not valid; is your activity running? at android.view.ViewRootImpl.setView(ViewRootImpl.java:679) at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:342) at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:93) at com.github.johnpersano.supertoasts.ManagerSuperToast.displaySuperToast(ManagerSuperToast.java:189) at com.github.johnpersano.supertoasts.ManagerSuperToast.handleMessage(ManagerSuperToast.java:146) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:154) at android.app.ActivityThread.main(ActivityThread.java:6119) at java.lang.reflect.Method.invoke(Native Method)