Problem using DatePicker with translation PT in version 18.2.44

[farnetani]

I have a problem with version 18.2.44 below when I click in icon of component Datepicker:

```

    Uncaught TypeError: Cannot read property 'valueOf' of null

    at DateTimePicker.CalendarBase.dayCell (calendar.js?2f9d:923)

    at DateTimePicker.CalendarBase.renderDays (calendar.js?2f9d:702)

    at DateTimePicker.Calendar.renderDays (calendar.js?2f9d:2122)

    at DateTimePicker.CalendarBase.renderMonths (calendar.js?2f9d:661)

    at DateTimePicker.Calendar.renderMonths (calendar.js?2f9d:2119)

    at DateTimePicker.CalendarBase.createContentBody (calendar.js?2f9d:341)

    at DateTimePicker.CalendarBase.createContent (calendar.js?2f9d:263)

    at DateTimePicker.Calendar.createContent (calendar.js?2f9d:2113)

    at DateTimePicker.CalendarBase.render (calendar.js?2f9d:134)

    at DateTimePicker.Calendar.render (calendar.js?2f9d:1998)

```

I already read the links below:

```

https://ej2.syncfusion.com/vue/documentation/datepicker/globalization/

https://ej2.syncfusion.com/vue/documentation/datetimepicker/globalization/

https://www.syncfusion.com/forums/145430/globalization-not-working-with-clrd-data

https://ej2.syncfusion.com/documentation/calendar/globalization/

```

My sample of code:

```App.vue

<template>

  <div id="app">

    <div class="wrapper">

      <ejs-datetimepicker id="datetime" locale="pt">ejs-datetimepicker>

    div>

  div>

template>

<script>

import Vue from 'vue'

import { loadCldr, L10n } from '@syncfusion/ej2-base'

import { DateTimePickerPlugin } from '@syncfusion/ej2-vue-calendars'

// Here we have referred local json files for preview purpose

import * as numberingSystems from 'cldr-data/supplemental/numberingSystems.json'

import * as gregorian from 'cldr-data/main/pt/ca-gregorian.json'

import * as numbers from 'cldr-data/main/pt/numbers.json'

import * as timeZoneNames from 'cldr-data/main/pt/timeZoneNames.json'

import { pt } from '@/assets/pt.json'

Vue.use(DateTimePickerPlugin)

loadCldr(numberingSystems, gregorian, numbers, timeZoneNames)

L10n.load({ pt: pt })

// L10n.load({

//   pt: {

//     datepicker: {

//       placeholder: 'Wählen Sie Datum und Uhrzeit',

//       today: 'heute'

//     }

//   }

// })

export default {}

script>

<style>

@import "../node_modules/@syncfusion/ej2-base/styles/material.css";

@import "../node_modules/@syncfusion/ej2-buttons/styles/material.css";

@import "../node_modules/@syncfusion/ej2-inputs/styles/material.css";

@import "../node_modules/@syncfusion/ej2-popups/styles/material.css";

@import "../node_modules/@syncfusion/ej2-lists/styles/material.css";

@import "../node_modules/@syncfusion/ej2-vue-calendars/styles/material.css";

.wrapper {

  max-width: 250px;

  margin: 0 auto;

}

style>

```

Code of my ' pt.json'  in assets

https://gist.github.com/farnetani/c777f651b7fc99e53adad90405785b59

[Sevvandhi Nagulan]

Hi Arlei, 

Greetings from Syncfusion support.
 

  

We have checked the reported issue and we have considered as a defect in our end. The fix for the issue will be included in the next patch release which is expected to be rolled out on 9^th September 2020. We thank you for spending your time to report the issue and helping us to improve our product. You can track the status of the issue using below feedback link. 

Feedback Link    : https://www.syncfusion.com/feedback/17611/ 

We appreciate your patience until then. 

Regards, 

Sevvandhi N