Comment # 1 on bug 1167315 from Stefan Hundhammer

I see a lot of crashes in your y2logs.

They all start with

...[Y2Ruby] binary/Y2RubyUtils.cc(y2_require):26
   cannot require yast:undefined method `_' for FastGettext::Translation:Module
   at /usr/lib64/ruby/vendor_ruby/2.5.0/yast/i18n.rb:61:in `_'

...[Y2Ruby] binary/Y2RubyUtils.cc(y2_require):26
   cannot require yast:undefined method `message' for nil:NilClass
   at /usr/lib64/ruby/vendor_ruby/2.5.0/yast/yast.rb:186:in `import_pure'

...[Interpreter] yast/i18n.rb:144
   Runtime error when loading module 'PackageCallbacks'

...[Ruby] yast/wfm.rb:253
   Client /usr/share/YaST2/clients/sw_single.rb failed with
   'Failed to load Module 'PackageCallbacks' due to:
   undefined method `message' for nil:NilClass' (RuntimeError).