I am experiencing this problem as well. I have removed simple share from both Facebook and Constant contact and relinked TWICE. I still get the same unknown error message. I would like a notification when this issue is fixed. I have also tried the other suggestions of using other browsers, etc. to no avail.
I opened your case to the second level support team to have you notified when this is resolved. Thanks for your patience.
We are having the same issue. Twitter posts fine but the post to facebook fails with an unknown error. followed the directions from earlier posts. Nothing seems to fix it.
I have opened a Case within your account and tracked this issue. Would you like to be notified when this is resolved?
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