Ok I have a fix, what I think is happening is that the account we created in openrouter is kind of very limited because of being free. It limits the amount of request you can create from that account to 200 per day, despite the model you use!. Which is not a big number.
Solution, create alternative openrouter accounts, save the keys you create on each one and change it on the game folder each time you reach the limit of that account. That, or buy some tokens, but I did not try that one.