Trying to understand and download file with SFTP.download in Ruby/Rails - ruby-on-rails

Question

I'm trying to download a file into a Rails application using the SFTP method with sftp.download!('path/to/remote/folder/#{filename}', 'path/to/local/folder)
The full methods:
def missouri
sftp = Net::SFTP.start('host.name', '<username>', password: '<password>')
sftp.dir.entries('/path/to/remote/folder/') do |entry|
sftp.download!('/path/to/remote/folder/#{entry.name}.txt', '/Users/<me>/local/folder/')
end
end
I get an error:
RuntimeError (open /path/to/remote/folder/filename.txt: no such file (2))
If I take away the file extension (txt), I get the error:
Errno::EACCES (Permission denied # rb_sysopen - /Users/<me>/local/folder/)
When I 'drill' down to that part and run this method, I get a return of the NET::Sftp object with all of it's attributes but no actual download. The SFTP I'm trying to access is an ASPX.human page and the path I'm trying to download the file is within the file structure of the remote site so I'm not sure if I'm trying to access the wrong path?
If I go to the actual SFTP, I can clearly see a file sitting there.

Answer 1

The comment you added after your question makes we wonder about unix rights. Is your script launched by a user that is allowed to write on the destination local directory?
Said differently, what is the output of the following shell command?
ls -l /path/to/remote/folder
And what are the user/group used your script?
By the way, one thing strange in your code:
sftp.download!('/path/to/remote/folder/#{entry.name}.txt'
should be:
sftp.download!("/path/to/remote/folder/#{entry.name}.txt"
Otherwise entry.name would not be replaced.