Successfully installed finion_template_v2.0.1.zip into joomla v4.0.4. When selecting Template Options button on the finion Templates:Edit Style page, the resulting helix page displays shows a 'Sorry, there was a problem we could not recover from. The server returned a "500 - Whoops, looks like something went wrong."' error. Initially the error page showed additional warning at top: "Missing Webfonts.json File. Please Go To Advanced > Font Settings And Add Google Font Api And Update." From a search of forum found this item https://www.joomshaper.com/forum/question/7207?order=newest which had a webfonts.json that I put into the templates\finion\webfonts folder, and that warning went away but still have the "Sorry" page.

Additional info from submitter - I turned on debug in the configuration.php file and error shows as: Error Failed opening required 'etpub\wwwroot\joomla4\templates\finion\html\com_content\article\default.php'

There is a file named default.php in the noted directory (starting at c:\inetpub - I assume the message cutoff the initial part of the path). I believe permissions are valid so not sure why error ocurring.

One other observation - the helix ultimate page shows helix v2.0.5