issues with setting up test github webapp -- php/f;utter??

Hi.
Long shot, but I'm posting in hopes someone can offer pointers on
what's going on. I'm doing the research (trial/error), but input from
the list might be useful as well.

I'm, trying to setup/test a github webapp --
GitHub - invoiceninja/invoiceninja: Invoices, Expenses and Tasks built with Laravel, Flutter and React.

The test system, ubuntu/apache/php/mysql/etc. The test url --
http://161.35.5.174/invoiceninja

I get a "blank" page for the above url. I've played/modified wuth the
conf files, as well as the .htaccess files. with no change. I changed
dir/file premissions as well.

I then looked at the "view source"... and saw the following!!

<body class="h-full">
  <noscript>You need to enable JavaScript to run this app.</noscript>
  <div id="root"></div>

</body>

<!--

If you are reading this, there is a fair change that the react
application has not loaded for you. There are a couple of solutions:

1. Download the release file from
GitHub - invoiceninja/invoiceninja: Invoices, Expenses and Tasks built with Laravel, Flutter and React and overwrite your
current installation.
2. Switch back to the Flutter application by editing the database, you
can do this with the following SQL

UPDATE accounts SET
set_react_as_default_ap = 0;

Well... this appears to be something diff!!

Appears to be front side tech, but I've never used flutter. Anyone
have any skills/pointers on this?

I'm doing the research, but thought I'd ask here as well.

thanks

bruce
badouglas@gmail.com