Is there a way to properly format with React-Intl where I don't get this error?

I am working on a React Native application where I need the post_date that I am getting back from a third-party API to not show up as: 2019-05-10 11:26:39, but instead display: x many days ago.

I tried installing React-Intl and then implementing it in App.js like so:

import React from "react";
import { StyleSheet, Text, View } from "react-native";
import {
  createBottomTabNavigator,
  createStackNavigator,
  createAppContainer
} from "react-navigation";
import { Provider } from "react-redux";
import { IntlProvider } from "react-intl";
import store from "./store";
import AuthScreen from "./screens/AuthScreen";
import WelcomeScreen from "./screens/WelcomeScreen";
import MapScreen from "./screens/MapScreen";
import DeckScreen from "./screens/DeckScreen";
import SettingsScreen from "./screens/SettingsScreen";
import ReviewScreen from "./screens/ReviewScreen";

const MainNavigator = createAppContainer(
  createBottomTabNavigator({
    welcome: WelcomeScreen,
    auth: AuthScreen,
    main: {
      screen: createBottomTabNavigator({
        map: MapScreen,
        deck: DeckScreen,
        review: {
          screen: createStackNavigator({
            review: ReviewScreen,
            settings: SettingsScreen
          })
        }
      })
    }
  })
);

export default class App extends React.Component {
  render() {
    return (
      <Provider store={store}>
        <View style={styles.container}>
          <IntlProvider locale="en">
            <MainNavigator />
          </IntlProvider>
        </View>
      </Provider>
    );
  }
}

And in my DeckScreen.js like so:

import React, { Component } from "react";
import { View, Text, Platform } from "react-native";
import { MapView } from "expo";
import { connect } from "react-redux";
import { Card, Button } from "react-native-elements";
// import Moment from "react-moment";
import { FormattedRelative } from "react-intl";
import Swipe from "../components/Swipe";
import * as actions from "../actions";

class DeckScreen extends Component {
  renderCard(job) {
    return (
      <Card title={job.title}>
        <View style={{ height: 300 }}>
          <MapView
            scrollEnabled={false}
            style={{ flex: 1 }}
            cacheEnabled={Platform.OS === "android" ? true : false}
          />
        </View>
        <View style={styles.detailWrapper}>
          <Text>{job.company.id}</Text>
          <FormattedRelative value={job.post_date.toString()} />
        </View>
        <Text>
          {job.description.replace(/<span>/g, "").replace(/<\/span>/g, "")}
        </Text>
      </Card>
    );
  }

I feel like I am closer to getting what I want with React-Intl than with Momentjs, but I am getting this error:

console.error: "[React Intl] Error formatting relative time. RangeError: The date value provided to IntlRelativeFormat#format() is not in valid range."

Is my code not formatted properly? Anyone have experience with how to implement FormattedRelative from React-Intl?

I know I can use toDateString() to get rid of the timestamp portion 2019-05-10 11:26:39 but when I try to implement it via <FormattedRelative value={job.post_date.toDateString()} />, I continue to get the same error message.