I'm not very familiar with Linux, so what I posted before is pretty much all I have for suggestions. However, I can try to help with getting the web version to work instead. Did you follow this link for setting up browser permissions? And if you did, what error's/issue's are you getting? https://www.reddit.com/r/RPGMaker/comments/dqvdqo/fix_error_failed_to_load_dataa...
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To run it through a web browser, you'd basically just open the web browser, then drag the "index.html" file into the browser. That or right click->open with->select your browser. However, you'll have to change a setting on your browser to ensure the game runs successfully, this link explains how. https://www.reddit.com/r/RPGMaker/comments/dqvdqo/fix_error_failed_to_load_dataa... I can confirm it should work with firefox at the moment, as I tested it just now to make sure.