Invalid JS & CSS insertion

There are a couple of validation errors caused by the plugin.

The plugin is inserting an inline style in the body element. (src/Php/Main.php:157)

And attempting to asynchronously load inline JS with a redundant type attribute. (DelayedScript/DelayedScript.php:28)

Both are invalid.

The inline CSS should be moved to a wp_head action.

AFAIK you can’t async inline JS, although it might be possible to include the script as a data value in the src attribute. Seems unnecessary, anyway, given the timeout and the eventlisteners.