SSR example not working?

[kohlerm]

Bug report

Delete this section if this is a feature request.

• Skate version: 5.2.4 (checked out git repo)
• Affected browsers (and versions): Chrome

I'm trying to get the SSR example running at skatejs/packages/ssr/example
I ran npm install then yarn start

when open the web page I get :

auditfor details  kohlerm  …  packages  ssr  example  yarn start yarn run v1.10.1 $ node . Server running at: http://localhost:8000 (node:71662) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'dispatchEvent' of undefined at Function.trigger (/home/kohlerm/skatejs/packages/ssr/register/dom/MutationObserver.js:100:16) at ElementProto.setAttribute (/home/kohlerm/skatejs/packages/ssr/register/dom/Element.js:97:20) at /home/kohlerm/skatejs/packages/ssr/register/dom/Element.js:43:47 at Array.forEach (<anonymous>) at translateParsed (/home/kohlerm/skatejs/packages/ssr/register/dom/Element.js:43:13) at /home/kohlerm/skatejs/packages/ssr/register/dom/Element.js:48:46 at Array.forEach (<anonymous>) at translateParsed (/home/kohlerm/skatejs/packages/ssr/register/dom/Element.js:48:16) at /home/kohlerm/skatejs/packages/ssr/register/dom/Element.js:48:46 at Array.forEach (<anonymous>) (node:71662) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:71662) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

I tried with different node versions currently at v12.16.2

any hint what went wrong would be appreciated.