Might want to just restart computer. Full restart, hold down the power button until it's hard resetting. If that doesn't work, uninstall and redownload. There is no software error in the game itself since I just played it on pc, so it must be a hardware issue. Unless you are on Android or Mac, then I have no idea sorry but still try my 2 suggestions
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I have the same exact error. For OP: don't fear! You aren't supposed to click that option for the event to trigger, you have just to be at the right moment of the story and go there. Other screens that gives the same exact error: ALL gifts for girls the moment you hover the mouse over them, ALL the options that has to do with "organizing" them in some way, like training.