What were you trying to do when the problem occurred and how often is this
problem occurring?
past two days, trying to do the Mastery math challenges when I go to my dashboard
If you reload the page and do the exact same action again, what happens?
reloading just returns it to the same page, with the same result when I try to click on Mastery.
What browser and version are you using?
Please provide any additional information below.
I don't have this problem with other online programs or web pages, including shopping pages and my banking page, so I really think it's your program, and not my computer.