I can't install the app.
it is possible that you are experiencing the issue because of the device cache, or it is caused by a different application.
If this is the case, please delete the data as instructed below, and confirm again.
 Open the Browser > MENU > Others > Setting > Privacy > Cache Clear
 Menu＞Setting>Application＞delete application and data(Choose “Apps that you want to uninstall”)
(*CAUTION: In some cases when you delete the data, it will be deleted in your application completely.)
*The flow may vary depending on your device. For more details, please refer to your manual, or you can also contact your device manufacturer.