Hi all, It seems that #1038935 is happening if ruby-arel is installed.
Looking at ruby-arel: Upstream tells, since 2018/04/24 [1]: Arel is now bundled in the Active Record gem, and maintained in the rails/rails repository. It seems it's only still required by ruby-premailer-rails 1.10.3-3, as present in the archive currently. Upstream doesn't mention it in the current version 1.12.0 [2]. If ruby-premailer-rails would be updated accordingly, I guess ruby-arel could be removed -- what do you think? Cheers, Georg [1] https://github.com/rails/arel [2] https://github.com/fphilipe/premailer-rails/blob/v1.12.0/premailer-rails.gemspec