This error has been logged! You may wish to head to the bug forum and report it, too. (But you probably don't need to mention it in the Help Chat Channel.)[UncaughtErrorEvent type="uncaughtError" bubbles=true cancelable=true eventPhase=2]
TypeError: Error #1009
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This happened earlier as well in another part of the world; prevented me from being able to move after dismissing the dialog (then got an OMG reload!).
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Also, just a side note, the error popup is helpful, especially since we can click to copy the error message to the clipboard. Kudos!