Weird blank dialog created during the report creation proocess for "openssh-client"

STEPS

1. Run "ubuntu-bug openssh-client"
2. Wait for the report creation process to run

ACTUAL RESULT
A weird blank dialog appears. See attachment.

EXPECTED RESULT
Normal run as usual with the browser opening a webpage for the bug reporting.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: apport 2.20.1-0ubuntu2.1
Uname: Linux 4.4.13-040413-lowlatency x86_64
NonfreeKernelModules: rfcomm ipt_REJECT nf_reject_ipv4 pci_stub vboxpci vboxnetadp vboxnetflt vboxdrv bnep btusb btrtl btbcm btintel xt_multiport iptable_filter ip_tables x_tables 8812au ath3k cfg80211 bluetooth uas usb_storage input_leds hp_wmi sparse_keymap snd_hda_codec_realtek snd_hda_codec_generic intel_rapl x86_pkg_temp_thermal intel_powerclamp snd_hda_intel coretemp snd_hda_codec kvm_intel snd_hda_core kvm snd_hwdep snd_pcm irqbypass crct10dif_pclmul crc32_pclmul aesni_intel snd_seq_midi aes_x86_64 snd_seq_midi_event lrw snd_rawmidi gf128mul glue_helper ablk_helper cryptd snd_seq snd_seq_device serio_raw snd_timer mei_me snd mei soundcore shpchp lpc_ich 8250_fintek mac_hid parport_pc ppdev lp parport autofs4 xfs raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 multipath linear hid_generic usbhid hid raid0 i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt psmouse ahci fb_sys_fops libahci drm r8169 mii wmi fjes video
ApportLog:

ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: KDE
Date: Fri Jun 17 12:02:34 2016
InstallationDate: Installed on 2016-04-22 (55 days ago)
InstallationMedia: Kubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
PackageArchitecture: all
SourcePackage: apport
UpgradeStatus: No upgrade log present (probably fresh install)