How do i send a message on Twitter?

[Brandon]

I have tried sending a message to a person I followed but everytime i try it says it failed. I didn't go over the character limit and this person didn't follow me. Is that what is holding me back? Does the other person have to be following me?

[Alex]

they have to be following you aswell as you following them to send a direct message. There should't be a error, use this to report and get help https://support.twitter.com/forms/tweets (the second checkbox)