Event details not visible on hover

Love how the demo looks here:

https://preview.codecanyon.net/item/noo-timetable-responsive-wordpress-timetable-plugin/full_screen_preview/17511898?_ga=2.209469329.2013560902.1744980190-1993504023.1719432654

I installed the plugin and added shortcode to the following page:

https://graciecharlottesville.com/schedule-dev/

But the block for the event doesn't fill the day's column left to right, and when you hover over the event you can't see all of its info.

Here's my shortcode:

[ntt_schedule schedule_layout="grid" source="class" default_view="agendaWeek" item_limit="0" min_time="6:00:00" max_time="21:00:00" show_time_column="yes" general_header_background="#000000" general_header_color="#ffffff" general_today_column="#f7f7f7" filter_type="category" show_weekends="sat,sun"]