NoMethodError in Spree::Admin::Stores#edit

[aaronsmulktis]

I believe this occurred because of a difference between Spree 3.7 and 4.2, but I can't be sure.

This error can be seen by navigating to Configuration > Stores > Edit
http://localhost:8080/admin/stores/1/edit

I also think I saw this error when I was running some migrations, can't remember.

Showing /dna/app/views/spree/admin/stores/_form.html.erb where line #164 raised:

undefined method `supported_locales' for #<Spree::Store:0x00007f11250522a0>
Did you mean?  supported_locales_list