I got reports from several of my clients that LinkedIn is hitting down on automation.
I got reports from people using Expandi and Phantomubster, that their account got flagged.
I even got reports of people not using any automation, getting flagged.
So it looks like LinkedIn playing around with the sensitivity of their bot detection system. The Situation might get a bit more stable in a few days.
For the time being, I recommend pausing most of the automation.