Solution 40401: Resolving the Error Another Instance of this Application is Already Running when using the TI-84 Plus CE online calculator.
How do I resolve the error "Another instance of this application is already running?
To resolve this error, you just need to click the button below the calculator [Make this instance active]. After clicking this button, you may need to wait 10 seconds for the emulated calculator to appear.
Please Note: If you do not see this button instead click [Tab] to select the button then [Enter]. If this does not work click [Refresh] on the Chrome Browser then [Tab] to select the button then [Enter].
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