stash@{1} is ambiguous?

Your shell is eating your curly brackets, so while you say stash@{1}, git sees stash@1 and that makes no sense to it. Quote the argument (use git stash apply "stash@{1}" or git stash apply stash@"{1}"; quoting either way will work) or reconfigure your shell to only expand curly brackets when there is a comma between them (zsh can be configured either way, bash only expands curly brackets with comma or range between them, other shells may behave one or other way).

Hi there I had the same thing happen to me. Easiest way of fix it was:

$ git stash apply stash@"{2}"

I'm using a windows git shell.