I cannot seem to generate the error message that you are seeing. My guess is that you have a potential infinite loop in your WF. Below is an example of such a WF -- interestingly I am not seeing the message (I am 188.8.131.52). The branch through the collect node can never terminate.
Im on version 184.108.40.206.
I only see then when I am trying to edit a WF.
It looks like its only happening to one specific WF. As soon as I select Edit now I get that error message.
I have not seen the pop-ups that you are describing.
A few questions:
Im getting a notification popping up whenever I do some work now.
WFBuilder: Infinite Layout Loop (Align Converge Nodes).
I have never seent his before.
Anyone else seen it?
Also, some of the lines have skewed off from showing its true connection. Everything stil works.