Hi Chiara, this is weird. I just tried previewing a study on the EU server and it works fine. Can you try again? It could be a temporary configuration mixup at our server provider.
If the problem persists, can you add search my name under "collaborators" and add me as a collaborator? I'll take a look at your experiment.
Edit: I'm pretty sure it's a temporary mixup at Cloudflare. We've reached out to them to let them know. It should not happen again.
If the problem persists, can you add search my name under "collaborators" and add me as a collaborator? I'll take a look at your experiment.
Edit: I'm pretty sure it's a temporary mixup at Cloudflare. We've reached out to them to let them know. It should not happen again.