Action Network ID attached

Don't use links that you've copied out of other emails
This is very important: links copied from other Action Network emails contain tracking links; people's personal Action Network ID's etc.
The error you get is a pop-up box list this...

The cause
Using this example:
https://www.surveymonkey.co.uk/r/CZZX5DN?link_id=2&can_id=071ccc07c7xxxxxxxxxxxxxd003
If you copied the link from an Action Network email that you had previously received - the link will have your personal ID attached (the &can_id=xxx part). You don't need any of the information after the question mark.
The solution
In this case you would just use https://www.surveymonkey.co.uk/r/CZZX5DN
This goes for other links with user info embedded - eg. some Google links or links to Facebook or a fundraiser. Just cut out the question mark and everything after, make sure the links still works and just use that instead.