Zeitwerk loading errors in production

[kjakub]

When running Rails 6.0.2.1, spree 4.0.3 on ruby 2.5.1 , zeitwerk - new default loader throwing following errors

uninitialized constant SpreeI18n::Version (NameError)
Did you mean? SpreeI18n::Version
SpreeI18n::VERSION

expected file bundler/gems/spree_i18n-215ae7eaafb7/lib/generators/spree_i18n/install/install_generator.rb to define constant Generators::SpreeI18n::Install::InstallGenerator, but didn't (Zeitwerk::NameError)

[kjakub]

#807