In Circuits.io I'm getting the above error when I try and download the gerber of the design.
Having read about, it was suggested it may be a through hole issue, however, I've deleted every part of the design with through holes and the error persists.
I also tried duplicating the design with no joy. It's odd, because I've previously successfully downloaded the gerber- this iteration has had minor changes to it, which I have since removed with no joy.
The following link takes you to the design with which I am having problems.
I wonder if the issue might be server side as I am recently receiving a "500 bad gateway error" on the first couple of attempts to load the page.
Many thanks for your help,