Hello Frank,
Thanks for writing in!
After further investigation, I found out that you are having this kind of issue because you added this custom css:
.flex-control-nav {
position:Absolute;
bottom: 0px;
left: 40px;
right: auto;
top:auto;
padding: 0px;
background-color: transparent;
line-height: 0em !important;
z-index: 9999 !important;
}
Are you the one you aded this? Please have the code removed so that the text will be display and that the slide indicators will not display on top of the slides because this is what is happening now.
Once it is removed, you will have something like this:

Hope this helps.