No such file or directory @ rb_sysopen Error with AWS S3

I am trying to open a CSV File stored in an AWS S3 using Rails Active Storage but am getting the below error message. I am able to upload and download files without issues but seems to be an issue with the code.

Error:

No such file or directory @ rb_sysopen- then it has the AWS URL - if this is copied and then pasted in the browser, I am able to download the file.

Code:

url = @item.csv.urlcsv_file = File.open(url)@data = SmarterCSV.process( csv_file)

The following are at the top of my controller as well

require 'open-uri'require 'csv'