Gtk-Message: 16:24:10.462: GtkDialog mapped without a transient parent. This is discouraged.
-> main/exit
```
My main Ubuntu installation/current environment is on /dev/sda5; the grub configuration I'm attempting to modify is on a USB stick on /dev/sdb1 (formatted ext2, if that matters).
I'm running into this issue today. I just installed grub-customizer, the "About" screen shows v5.1.0.
I'm not sure the `verbose` option provides any additional useful output, but FWIW here it is:
```
-> main/refresh-tab
-> main/save
*** writing settings file
[font file exists]
-> theme/save
*** writing grub list configuration font-size font-size
-> theme/post-save
-> settings/sync
-> settings/sync
-> theme/update-
-> theme/update-
-> main/sync- save-state mpl::syncListVi ew_save] ollerImpl: :syncListView_ save completed]
[running MainControllerI
[MainContr
-> main/sync- save-state mpl::syncListVi ew_save] ollerImpl: :syncListView_ save completed]
[running MainControllerI
[MainContr
-> main/sync- save-state mpl::syncListVi ew_save] ollerImpl: :syncListView_ save completed]
[running MainControllerI
[MainContr
[Generating grub configuration file ...] save-state mpl::syncListVi ew_save] ollerImpl: :syncListView_ save completed]
-> main/sync-
[running MainControllerI
[MainContr
[using custom appearance settings] save-state mpl::syncListVi ew_save] ollerImpl: :syncListView_ save completed]
-> main/sync-
[running MainControllerI
[MainContr
[/ etc/grub. d/06_linux_ proxy: 3: /etc/grub. d/06_linux_ proxy: /etc/grub. d/bin/grubcfg_ proxy: not found] save-state mpl::syncListVi ew_save] ollerImpl: :syncListView_ save completed]
-> main/sync-
[running MainControllerI
[MainContr
[cat: write error: Broken pipe] save-state mpl::syncListVi ew_save] ollerImpl: :syncListView_ save completed]
-> main/sync-
[running MainControllerI
[MainContr
-> main/sync- save-state mpl::syncListVi ew_save] ollerImpl: :syncListView_ save completed]
[running MainControllerI
[MainContr
Gtk-Message: 16:24:10.462: GtkDialog mapped without a transient parent. This is discouraged.
-> main/exit
```
My main Ubuntu installation/ current environment is on /dev/sda5; the grub configuration I'm attempting to modify is on a USB stick on /dev/sdb1 (formatted ext2, if that matters).