PHP: Errors in Apache log and console

Hi

I'm attempting to install Apachie-Jena  Fuseki  and Skosmos  in windows 10 following this guide    which uses XAMPP

When I try and test Skosmos using test data from here loading-data

All good so far the data is loaded and reports correctly  however when I try and view the data in Skosmos I get the following in Apache logs

[Wed Jan 08 12:02:25.561396 2020] [php7:notice] [pid 11176:tid 1944] [client ::1:58254] PHP Notice:  Undefined index: http://www.w3.org/2004/02/skos/core#Concept in C:\\xampp\\htdocs\\skosmos\\controller\\RestController.php on line 288, referer: http://localhost:8080/skosmos/stw/en/
[Wed Jan 08 12:02:25.694397 2020] [php7:notice] [pid 11176:tid 1936] [client ::1:58263] PHP Notice:  Undefined offset: 0 in C:\\xampp\\htdocs\\skosmos\\controller\\WebController.php on line 642, referer: http://localhost:8080/skosmos/stw/en/

and in Chrome dev tools

http://localhost:8080/skosmos/resource/css/stylesheet.css net::ERR_ABORTED 404 (Not Found)
jquery.min.js:4 GET http://localhost:8080/skosmos/rest/v1/types?lang=en 500 (Internal Server Error)

I'm not total sure what line 288 of RestController.php is doing the web page "http://www.w3.org/2004/02/skos/core#Concept" doesn't exist but in a browser gets redirected to https://www.w3.org/2009/08/skos-reference/skos.html#Concept I attempted to change the urls but  it still fails
WebController.php
RestController.php