Whenever one of my students clicks on the Play button, they get an error message "Error Opening Zip File" . the same thing happens whether it is a contest I created or one of the posted contests.
My class ICHS Chemistry 2016 and students are listed as playing the game, but their foldit programs don't su\how the contests. When I have the students download them again, they do appear in the list of contests, but the zip file error prevents them from playing the contest.
We're using MacBook Pro laptops with Yosemite installed.
How can this be fixed?