If you're trying to send an SMS message and it's showing you this error message An error has occurred. Please try again. Error message: The From phone number is not a valid, SMS-capable inbound phone number or shortcode for your account.
That's because the Twilio phone number we use to send the SMS is Voice-capable only.
Let's make sure the Twilio number offers both SMS + Voice capabilities based on the list of countries listed here: Twilio international phone number availability and their capabilities
Since our search function is basic and it doesn't show much information about whether or not the Twilio number has SMS/voice capabilities.