I'm still unable to test locally newly built HTML5 apps. They are running correctly online.
Components are loaded but the window remains blankI the spinning wheel turning...
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André Rombauts, Liège (Belgium).
Retired teacher ( French language, History, English language and Computer science).
LC 9.6.6 (Business / HTML5 edition), testing LC 10 DP1.
Mac OS 11.6.2 Big Sur, MacBook Pro 16" 2019 (and other computers...).
In order to test with LC 9.0.5 or later simply hit the button TEST of the LC toolbar.
Optionally select a browser different from the default browser of your OS from menu Development > Test Target.
Then LC opens your standalone with a (newly generated) local server using files generated in the temporary folder.
You only have an advantage from your own local server if you are using your own html5 template or input other sources like js or css files or images to the html.
In your browser use its development tools to see JS console messages.