Bots might be unable to trade you in following cases:
1. You are temporarily unable to trade (signed in into Steam on a new device, changed the email or password recently, got your Steam Guard settings changed, got VAC-banned).
2. Your inventory is not set to "Public" in privacy settings (How do I check it?)
3. Your profile trade URL should match the one on Steam.
4. Steam has some performance issues, the servers are loaded heavily. Try to get your winnings later.
If you still have some problems contact ([email protected])