If there is a violation, the traffic will be restricted.

It is usually caused by unstable network or no network. Just confirm that the network connection is normal and click Resend. 2. If the sent message contains illegal content, it will be blocked. Just change the wording or phrase and resend it. 3. The other party has set you on the blacklist. The other party cannot receive the messages you send, and the other party needs to lift the blacklist restriction.