Acrobat Pro DC Running JavaScript

I am running JavaScript in my Acrobat Doc to validate and flatten all the entered fields and attach the pdf file to an email. Everything works perfectly.

I added a field for signature and the button does not work then the form is signed. I am not sure if the signature disables the button or prevents JavaScript from running. I would really appreciate any help. Thank you.

Here is my code.

var success = 0;

var validEntries = false;

for (var i = 0; i < requiredFields.length; i++) {

  var fieldName = requiredFields;

  var field = this.getField(fieldName);

  if (isFilled(field.value)) {

  success ++;

  } else {

  app.alert("Please enter the selected required field.");

  field.setFocus();

  break;

  }

}

if (success == requiredFields.length) {

  for (var i = a_and_l_services.length - 1; i >= 0; i--) {

  if (this.getField(a_and_l_services).value == "On") {

  validEntries = true;

  break;

  }

  }

}

if (validEntries) {

  disable();

  var toAddr = this.getField(someField).value;

  var toCC = "email@example.com";

  var subject = this.getField(field1).value + " - " + this.getField(field2).value + " - Review Required - Architecture and Launch";

  var message = "Exception Review Required - Architecture and Launch Services. The attached file is the filled-out form. Please open it to review the data.";

  this.mailDoc({bUI: true, cTo: toAddr, cCc: toCC, cSubject: subject, cMsg: message});

}

function isFilled(str) {

  return str != "" && str != "nil" && str.length != 0;

}

function disable() {

  for (var i = allFields.length - 1; i >= 0; i--) {

  var field = this.getField(allFields);

  field.readonly = true;

  field.fillColor = ["G", 0.75];

  field.borderColor = ["G", 2/3];

  field.textColorr = ["G", 0.5];

  }

}