I keep getting this error: "confirm chat switched failed"

[chemicalchaos]

I have been getting the same error - I believe it ONLY HAPPENS when sending to phonenumbers that are in my contacts (i.e., there's a name associated with the number). Unknown numbers, even if previously texted, appear to be going through.

[brismuth]

This is already resolved in the latest version of the extension, you’ll just need to update it: https://github.com/brismuth/google-voice-bulk-texter#update-it