Error opening signer certificate /etc/passbook/keys/

[yozef]

I've done everything that was mentioned to the letter:
1- Exported the .p12 certificate of the Pass Type.
2- Added that .p12 file into etc/passbook/keys/
3- Ran node-passbook prepare-keys -p keys
4- Entered Import Password, Entered PEM pass phrase, and Verifying Enter PEM pass phrase
5- I do see in the keys/ folder now: com.xxxx.yyy.pem, wwdr.pem and my original com.xxx.yyy.p12 file

I call the createMyPass method:

var template = createTemplate("boardingPass", {
   passTypeIdentifier:"pass.com.xxx.yyy",
   teamIdentifier:      "8XYZ876JS", // not the real one
   backgroundColor: "rgb(255,255,255)",
});
template.keys("/etc/passbook/keys", "password_when_creating_PEM"); // from step 4
template.loadImagesFrom("images"); // has icon.png and @2x as well as logo.png and @2x

function createMyPass(req, res) {

    var pass = template.createPass({
        serialNumber:   "123456",
        organizationName: "Some Org",
        description:    "20% off",
        icon:       "icon.png"
    });

    pass.fields.barcode = {
        message: "ABC123456789",
        format: "PKBarcodeFormatPDF417",
    };

    var file = fs.createWriteStream("mypass.pkpass");

    pass.on("error", function(error) {
      logger.info('Error: ' + error);
      process.exit(1);
    });

    pass.pipe(file);

    pass.render(res, function(error) {
            if (error) logger.info('Error: ' + error);
    });
};

When this method gets called, I get in the console:

 | Error: Error: Error opening signer certificate /etc/passbook/keys/com.xxx.yyy.pem
48790:error:02001002:system library:fopen:No such file or directory:/BuildRoot/Library/Caches/com.apple.xbs/Sources/OpenSSL098/OpenSSL098-59.40.2/src/crypto/bio/bss_file.c:356:fopen('/etc/passbook/keys/com.xxx.yyy..pem','r')
48790:error:20074002:BIO routines:FILE_CTRL:system lib:/BuildRoot/Library/Caches/com.apple.xbs/Sources/OpenSSL098/OpenSSL098-59.40.2/src/crypto/bio/bss_file.c:358:
unable to load certificate

[yozef]

Changing the location of the keys works.