I am surprised with the name of servers from the error dialogs. Where did you connect from? The NRP collab, the web site, or a previously bookmarked link? We do not update these neurorobotics-dev and neurorobotics-staging servers anymore and the online platform has moved to new resources accessible from our website at neurorobotics.net, or recently from our updated Neurorobotics collab.
Can you try your code on these newer servers ("Online Platform" button in the website). If you changed your experiment a lot, you can download the files individually from the Download buttons and upload them in the new servers. You will have to clone an experiment first, that resembles the one you are working on.