Expected behavior pickdate or date picker works.

Actual behavior

jquery.min.js:2 Uncaught TypeError: $(...).pickdate is not a function
    at HTMLDocument.<anonymous> (myjquery_functions.js:17)
    at e (jquery.min.js:2)
    at t (jquery.min.js:2)

Resources (screenshots, code snippets etc.)

(at the bottom of my index.html)

  <script src="https://apis.google.com/js/platform.js"></script>
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
  <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>
  <!-- MDB core JavaScript -->
  <script type="text/javascript" src="js/mdb.js"></script>
  <script src="https://webrtc.github.io/adapter/adapter-latest.js"></script>
<!--TeleRehab JS Files-->
  <script type="text/javascript" src="js/main.js" ></script>
  <script type="text/javascript" src="js/myjquery_functions.js"></script>

mdb.js is loading fine. In my console I can see it's response:

/*!
 * Material Design for Bootstrap 4
 * Version: MDB Admin Dashboard 4.8.11
 *
 *
 * Copyright: Material Design for Bootstrap
 * https://mdbootstrap.com/
...

But it's like it's not looking at mdb.js? As you can see it does say 4.8.11. So datepicker should work. However, not even pickdate works.

Thanks!