Showing error when open urbackupclient gui in ubuntu 16.04

ASSERT INFO:
…/src/gtk/bitmap.cpp(1328): assert “IsOk()” failed in GetPixbuf(): invalid bitmap

BACKTRACE:
[1] wxBitmap::GetPixbuf() const
[2] wxTaskBarIcon::Private::SetIcon()
[3] wxTaskBarIcon::SetIcon(wxIcon const&, wxString const&)
[4] wxIcon::~wxIcon() /usr/include/wx-3.0/wx/generic/icon.h:20
[5] wxEntry(int&, wchar_t**)
[6] main /root/urbackup-client-2.1.16.0/client/main.cpp:972
[7] __libc_start_main
[8] _start