Messages not being delivered

hello @diana

We are experiencing an issue where messages are not getting delivered by the getway , we are using rapidpro as a messaging gateway for sending and receiving messages.
When i try to send a message a in the messages tab the message gets in the failed state ie The sending attempt failed. Sending will not be retried without user intervention. as seen below

A ns in rapidpro as seen below

What could be the cause ?

Hi @cliff

Can you please check rapidpro UI for details about the errors?

hello @diana

When in explore the UI section of the failed messages i see