On macOS Sierra 10.12 , if a user presses modifier keys (such as Command, Shift, or Alt) while an applet is running in a browser, an error box named ���Internal Error��� might be displayed. It will also show the ���exec��� icon in the macOS dock. The user can dismiss the applet, or try to rerun the applet while not pressing a modifier key. To fix this problem, users can install JRE 8u112.
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