I'm experiencing the same issue. I have the most recent version of Java (6, Update 32) and I've republished my course in Presenter and I still receive an LMS API error message. We have a license on a couple of computers and I'm receiving the error on the other computer as well. Any thoughts?
Grout needs between 48 and 72 hours to dry before it can be properly sealed. Despite the fact that grout often looks dry within a few hours, sealing it too early can damage the grout and keep it from effectively doing its job. Keep Learning.
Apply and Dry. After applying your unsanded grout to the spaces between tiles, allow it to cure for at least two days until thoroughly dry, then finish with a sealer. Choose a penetrating sealer that breathes as it soaks into the tile and grout.