During my work session ultimately pressing F12 and then clicking the chart ALSO started causing this error. I simply ignored the non modal error dialog and clicked the chart again and the text box edit window would open and I could save my text on the chart. In a short period I received many many many of these errors.
I attempted to email you my logs @ 12:00 AM Nov 14th using Help-> email support but your servers did not respond and ninja stated it could not send the email.

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