The file doesn't exist laravel

I have a function to display uploaded pdf file. I removed the former @readfile($file); as it does nothing and displays nothing. I did troubleshoot omegle.2yu.co on my file path ($file) and the resulted url displayed pdf. But when I used latter function return https://omegle.love response()->file($file); it displayed error that file doesn't exist but my $file string is correct. Could someone help me with that?