N8n slow when importing simple curl

n8n cloud hangs when importing this simple curl into an HTTP request

curl https://api.perplexity.ai/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "sonar",
    "messages": [
      { "role": "system", "content": "Sei un assistente legale." },
      { "role": "user",   "content": "Qual è la normativa italiana sul diritto d\'autore?" }
    ]
  }'

Why?

I have self-hosted n8n and it seems to work fine for me.