input == null!
java.lang.IllegalArgumentException: input == null!
at javax.imageio.ImageIO.read(ImageIO.java:1348)
at com.konifar.material_icon_generator.MaterialDesignIconGenerateDialog.copyFile(MaterialDesignIconGenerateDialog.java:461)
at com.konifar.material_icon_generator.MaterialDesignIconGenerateDialog.createIcon(MaterialDesignIconGenerateDialog.java:450)
at com.konifar.material_icon_generator.MaterialDesignIconGenerateDialog.create(MaterialDesignIconGenerateDialog.java:417)
at com.konifar.material_icon_generator.MaterialDesignIconGenerateDialog.doOKAction(MaterialDesignIconGenerateDialog.java:411)
at com.intellij.openapi.ui.DialogWrapper$OkAction.doAction(DialogWrapper.java:1821)
at com.intellij.openapi.ui.DialogWrapper$DialogWrapperAction.actionPerformed(DialogWrapper.java:1787)
at ...
The stacktrace :