Progess dialog is empty

[Uqbar]

The progress dialog only shows an horizontal bar.
See screenshot.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: usb-creator-kde 0.3.2
Uname: Linux 4.4.13-040413-lowlatency x86_64
NonfreeKernelModules: isofs usblp rfcomm pci_stub vboxpci vboxnetadp vboxnetflt vboxdrv xt_multiport iptable_filter ip_tables x_tables bnep 8812au cfg80211 btusb btrtl btbcm btintel bluetooth uas input_leds usb_storage snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_codec snd_hda_core snd_hwdep snd_pcm snd_seq_midi snd_seq_midi_event hp_wmi intel_rapl sparse_keymap x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel snd_rawmidi kvm irqbypass snd_seq crct10dif_pclmul crc32_pclmul snd_seq_device snd_timer aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd serio_raw snd lpc_ich soundcore mei_me mei shpchp 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 fb_sys_fops psmouse drm ahci r8169 libahci mii wmi fjes video
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
CurrentDesktop: KDE
Date: Fri Jun 10 08:55:01 2016
InstallationDate: Installed on 2016-04-22 (48 days ago)
InstallationMedia: Kubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
SourcePackage: usb-creator
UpgradeStatus: No upgrade log present (probably fresh install)