TopView unable to send SMS via Twilio

TopView unable to send SMS via Twilio

If you are seeing messaging fail from Twilio suddenly after working for a long time, you may need to register your account through Twilio for Application 2 Person messaging.
Follow Twilio's guidelines for this process: Direct Standard and Low Volume Standard registration overview | Twilio.

Twilio requires registration of companies that send messages to people from applications, called A2P messaging: Sole Proprietor API and Console experience for 10DLC Registration is now live (twilio.com).

Due to US carriers trying to regulate spam, Twilio has companies using their service conform to this registration requirement from the carriers. More information can be found in their explanation article: Programmable Messaging and US A2P 10DLC | Twilio.