Constant Contact – “parsererror: SyntaxError: Unexpected token <"

parsererror: SyntaxError: Unexpected token <

I ran into this error earlier today while working with a marketing client and was frustrated for a few minutes before discovering a simple solution.

The error is called when more than one tab of Constant Contact is open in your browser.

The simple solution is to close any other open Constant Contact tabs leaving a single instance running in your browser. A refresh of the page may be necessary to remedy the issue.

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