Floating Webview and BTT_PRESET_PATH

Describe the bug
I'm trying to display a basic floating Webview (i.e. the "Hello World" example), loaded or an index.html file in BTT_PRESET, but the file is not loading (i.e. Window frame is present, but the load indicator is spinning endlessly).
If I'm copying/pasting the content of the file and provide the content directly it's working.
If I'm referencing a website (netfilx.com), it's working.

Affected input device (e.g. MacBook Trackpad, Magic Mouse/Trackpad, Touch Bar, etc.):

Screenshots

Device information:

  • BetterTouchTool version: 3.401 (1631)