How to overcome this error caused by using nonesene file picker

09-03 12:24:31.920 20050-20050/com.college.dypiet E/AndroidRuntime: FATAL EXCEPTION: main
                                                                    Process: com.college.dypiet, PID: 20050
                                                                    java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.XmlResourceParser android.content.pm.PackageItemInfo.loadXmlMetaData(android.content.pm.PackageManager, java.lang.String)' on a null object reference
                                                                        at android.support.v4.content.FileProvider.parsePathStrategy(FileProvider.java:583)
                                                                        at android.support.v4.content.FileProvider.getPathStrategy(FileProvider.java:557)
                                                                        at android.support.v4.content.FileProvider.getUriForFile(FileProvider.java:399)
                                                                        at com.nononsenseapps.filepicker.FilePickerFragment.toUri(FilePickerFragment.java:201)
                                                                        at com.nononsenseapps.filepicker.FilePickerFragment.toUri(FilePickerFragment.java:28)
                                                                        at com.nononsenseapps.filepicker.AbstractFilePickerFragment.onClickOk(AbstractFilePickerFragment.java:312)
                                                                        at com.nononsenseapps.filepicker.AbstractFilePickerFragment$2.onClick(AbstractFilePickerFragment.java:196)
                                                                        at android.view.View.performClick(View.java:5610)
                                                                        at android.view.View$PerformClick.run(View.java:22265)
                                                                        at android.os.Handler.handleCallback(Handler.java:751)
                                                                        at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                        at android.os.Looper.loop(Looper.java:154)
                                                                        at android.app.ActivityThread.main(ActivityThread.java:6077)
                                                                        at java.lang.reflect.Method.invoke(Native Method)
                                                                        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
                                                                        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)