Hi,
Sorry for the issues you are having.
I am not able to provide support in the pre sales forum, but are you saying the Date and Times are not showing in the tooltip when you hover over an event?
It looks like this css is causing the text to be white:
.duration {
color: #fff;
}
Looks like you will need to change that in your theme to another color and maybe add another selector such as
.tribe-events-tooltip
in front of your new css to target just that area.
That is about all we can do to help on this.
Thanks