O3 + openrouter + n8n / Problem "in node 'Al Agent' Internal Server Error"

Hi! Please explain. I thought that through OpenRouter I could get any model from their list. (including the o3). But when I connect o3 I get a fictitious error. when I replace it with 4.1 or o4-mini or any other - no error. Only with o3 this is a problem. Why nobody warns about it? Is it like this for everyone? Is it connected directly with my anthropic account “Usage tier 1”? What the is the system? Thanks for the response!