# 550003: Source connection failed

Log Type: TWILIO

Log Level: ERROR

## Description

Unable to connect to the data source with the given configuration.

### Possible causes

* Invalid or expired credentials.
* Network connectivity issues between Twilio and the data source with the given host/port.

### Possible solutions

* Verify that the credentials provided are correct and have not expired.
* Check that the data source is accessible from the network and that any firewalls or allowlists permit Twilio's IP ranges.
* Review the source configuration for incorrect connection parameters.