Hello Franco. Sorry to hear that posting isn't working for you! Do you mind answering a few questions for us? We would like to try and reproduce this problem. Are you signed in using your npub? If so, I recommend signing in with you nsec since we don't support any relay activities (posting, liking, etc.) while only using your npub. If you are signed in using your nsec, does posting work when you restart the app? (close the app, then open it again). Please let us know, thank you.