direnv: referenced -u /.../.envrc does not exist

[EugenDueck]

Describe the bug
I just installed direnv for the first time, to try it out.
When cd-ing into a folder with an .envrc, direnv claims the .envrc file does not exist. This is somewhat ironic, as that error only is only shown when cd-ing into folders that does contain an .envrc. Also, the contents of .envrc do not get applied.

To wit:

> cd direnv-test/
direnv: referenced -u /private/tmp/direnv-test/.envrc does not exist
> cat /private/tmp/direnv-test/.envrc
export FOO=foo
> ls -l /private/tmp/direnv-test/.envrc
-rw-r--r--  1 userx  staff  15 Apr 28 18:18 /private/tmp/direnv-test/.envrc
> echo $FOO

>

To Reproduce

# install direnv via homebrew or a build from https://github.com/direnv/direnv/releases (direnv.darwin-arm64)
echo 'direnv hook fish | source' >> $HOME/.config/fish/config.fish
# restart fish
mkdir direnv-test
echo 'export FOO=foo' > direnv-test/.envrc
cd direnv-test
# direnv: referenced -u /private/tmp/direnv-test/.envrc does not exist
echo $FOO

Expected behavior
No error to be shown, and the contents of .envrc being applied.

Environment

• OS: MacOS 14.4.1 (23E224), Apple M2
• Shell: fish, version 3.7.1
• Direnv version: I tried 2.34.0, 2.30.0, and a couple of version in-between

Additional context

> tail -1 $HOME/.config/fish/config.fish
direnv hook fish | source

This seems to be different from #1079, where the issue creator states the problem does not exist with versions prior to 2.32.2.