Error when trying to push the Boxes help file

[Yuri Chornoivan <yurchor ukr net>]

Hi,

I'm trying to push a new uk translation into the Boxes repo:

https://l10n.gnome.org/vertimus/gnome-boxes/gnome-3-36/help/uk/

but Vertimus throws back an error message:

[Errno 1] Command: "if [ -e .gitmodules ]; then git submodule update --init; 
fi", Error: error: RPC failed; result=22, HTTP code = 404 fatal: The remote 
end hung up unexpectedly Unable to fetch in submodule path 'subprojects/gtk-
frdp'

Am I doing something wrong (the file itself seems to be XML-valid)?

Thanks in advance for your help.

Best regards,
Yuri