I've been trying to just get past the web installer to get started, but I can't seem to get past setting the locales and timezone. I get a 500 error trying to post settings, and as far as I can tell, ultimately that is because I don't have the file statamic/settings/defaults/fieldsets/system.yaml, which is throwing an exception. This is a brand new folder with the contents being copied from the downloaded zip file. I've searched extensively and not found anyone else having this issue.