You have two problems:
1) You are asking babel to load babel !
<script type="text/babel" src="unpkg.com/babel/standalone@6/babel.min.js"&g…
remove the attrib type="text/babel" + let the Browser do the loading from CDN
2) As others already said, your MyTag component should be loaded by babel (not by the Browser)
3) Then it will work ! And I did not just give some bullshit answer, i actually tried it .. haha !