4
xcGallery gives those errors when there is no data to display.
I noticed that you have a category already...can you upload a picture to it, and see if that takes some of the errors away?
Next is to make sure that you have set the group permissions up (all of them, even if you're not using them all), once there are categories, albums, and photo's, with permissions set for all groups, the errors go away.
(Thats been my experience anyway)
Happy Xoopsing!