@Anshu kumar, have you tried to reproduce WebDAV issue?
BTW since you are obviously don't have enough resources to focus on low priority issues like this, please consider at least adding more meaningful error messages on WebDAV errors. Also it makes sense to add an option in app to collect detailed log with debug information. It will be much easier for us users to provide such a log rather than sniff WebDAV traffic with Wireshark or something.