Hello @timowessels
I found out the issue, for some reason your Header template file was corrupted.
If you look into the content of the template, you’ll see the first element in the header has the ID trcdcj and it is defined to be child of trcdcj and have children elements trcdcj . This means, it is father and child of itself which is probably causing a loop in the Bricks code.
“header”:[{“id”:“trcdcj”,“name”:“container”,“settings”:[],“children”:[“trcdcj”],“parent”:“trcdcj” },…
As a quick workaround either you export the template, remove the children + parent values of the cases like this, and import the fixed template back; or you would need to redo the faulty templates.