Android/PHP JWT expiration - php

Question

I've implemented system wide with JWT. Everything is working great except a key point, the expiration method.
Map<String, Object> header = new HashMap<>();
header.put("typ", Header.JWT_TYPE);
String compactJws = Jwts.builder()
.setHeader(header)
.claim("email", email)
.claim("password", password)
.setIssuedAt(new Date(System.currentTimeMillis()))
.setExpiration(new Date(System.currentTimeMillis() + 3600000))
.signWith(SignatureAlgorithm.HS256, settings.getString("keychain", "password"))
.compact();
Request request = new Request.Builder()
.url(SITE_URL + "secure.php")
.post(new FormBody.Builder().add("data", compactJws).build())
.tag("login")
.build();
okClient.newCall(request).enqueue(this);
eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6Imd1eSIsInBhc3N3b3JkIjoiZ3V5IiwiaWF0IjoxNDk3NTU0MzAzLCJleHAiOjE0OTc1NTc5MDN9.4GFSC_OCYzkCxGetTFKKxoUkbpxWi51ccoKtIpPjz6g
<?php
$jwt = $_POST['data'];
require_once 'jwt/src/BeforeValidException.php';
require_once 'jwt/src/ExpiredException.php';
require_once 'jwt/src/SignatureInvalidException.php';
require_once 'jwt/src/JWT.php';
use \Firebase\JWT\JWT;
try {
$decoded_array = (array) JWT::decode($jwt, base64_decode("password"), array('HS256'));
}
catch (SignatureInvalidException $e) {
echo json_encode(array('user_id' => - 3, 'title' => 'Contact 3gcb19#gmail.com', 'msg' => 'SignatureInvalidException'));
exit(0);
}
catch (ExpiredException $e) {
echo json_encode(array('user_id' => - 3, 'title' => 'Contact 3gcb19#gmail.com', 'msg' => 'ExpiredException'));
exit(0);
}
catch (UnexpectedValueException $e) {
echo json_encode(array('user_id' => - 3, 'title' => 'Contact 3gcb19#gmail.com', 'msg' => 'UnexpectedValueException'));
exit(0);
}
$email = $decoded_array['email'];
$password = $decoded_array['password'];
Always throws an UnexpectedValueException
Remove the timestamps and it works fine on the php end
.setIssuedAt(new Date(System.currentTimeMillis()))
.setExpiration(new Date(System.currentTimeMillis() + 3600000))
What am I missing here??