Hi I added this code to my web site html body (end of body)

<script id="ze-snippet" src="https://static.zdassets.com/ekr/snippet.js?key=MyKey"> </script>

the chat is not been displayed and i keep getting error

Key is missing from snippet vendors~rollbar.noconflict.umd.min.js:1:58963
n https://static.zdassets.com/ekr/vendors~rollbar.noconflict.umd.min.js:1
oe http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
c http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
(Async: setTimeout handler)
_immediateFn http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
c http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
l http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
s http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
d http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
re http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
(Async: promise callback)
re http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
d http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
u http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
re http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
oe http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
<anonymous> http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
c http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
(Async: setTimeout handler)
_immediateFn http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
c http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
l http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
f http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
c http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
(Async: setTimeout handler)
_immediateFn http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
c http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
l http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
f http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
c http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
(Async: setTimeout handler)
_immediateFn http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
c http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
then http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
<anonymous> http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
<anonymous> http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
o http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
<anonymous> http://static.zdassets.com/ekr/snippet.js?key=MyKey:1
<anonymous> http://static.zdassets.com/ekr/snippet.js?key=MyKey:1

How Can I fix it? what did I do wrong?