HELP Customer's Course ERROR - LMS did not return valid status code

HI, I am having the same issue. "ERROR - LMS did not return a valid status code". The strange thing is I have three computers with Storyline 3 on them and two of the three have this error message every time the module is launched in our LMS. The third computer with Storyline 3 can take the unpublished material, publish it, and put it into the LMS and there is no issue. The only difference I see is that the computer that still "works" was the first one to have Storyline 3 installed. It is also the oldest and slowest. I have submitted a support case but have not heard anything back. Since I was using Articulate '13 previously I need to get all of our training modules converted by the end of the year and this is a major road block. Please get back to me with what can be done to get this corrected. FYI I uninstalled and reinstalled Storyline 3 on both of the computers that  are getting the ERROR message but it did not help.