I am getting this same error. I was able to resolve this by:
– Download the plugin
– Open the zip file
– Delete the folder ‘TRUNK’
– Go into the active plugin and remove ‘Heartbeat Control’ (If it exists)
– Now install and activate the plugin
You should no longer have this error. Hope this helps.
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This reply was modified 7 years, 9 months ago by busterboydesigns. Reason: addtional testing found workaround