31105: Invalid client name

This error occurs when the client identifier used for a Voice connection violates Twilio's rules for the <Client> noun or related Voice SDK identity requirements. The client identifier must be no longer than 256 characters and should not contain control, space, delimiter, or unwise characters. For Mobile SDKs, the identifier must use only alphanumeric characters and underscore.

• The client identifier includes control, space, delimiter, or unwise characters.
• The client identifier exceeds the 256 character limit.
• When using a Mobile Voice SDK, the identifier contains special characters other than underscore.

• Remove all control characters, spaces, delimiters, and unwise characters from the client identifier.
• Shorten the client identifier to 256 characters or fewer.
• For Mobile SDK implementations, restrict the identifier to alphanumeric characters and underscore.
• Verify that the identity you set in your Voice AccessToken or TwiML <Client> noun matches these requirements before generating or refreshing tokens.

• TwiML Voice: <Client>
• Voice SDKs
• Common Twilio Programmable Voice SDK Error Codes and Debugging Help