Error when installing appliance from SUSE Studio

During installation before asking me for language installer alerts:

Internal error. Please report a bug report with logs.
Details: component cannot import namespace 'GfxMenu'
Caller: /usr/lib64/ruby/vendor_ruby/2.1.0/yast/yast.rb:162:in 'import_pure'


Calling the YaST module 'firstboot_language' has failed.
More information can be found near the end of the '/var/log/YaST3/y2log' file.

This is worth reporting a bug at
Please, attach also all YaST logs stored in the '/var/log/YaST2/' directory.
See for more information about YaST logs.

Before I’ll follow instructions above I’d like to know, if anyone had already met such a behavior? What does that mean and can it be corrected manually?