Consul-envoy error: invalid character 'T' after object key:value pair

Whenever I run the consul-envoy container with a -sidecar-for option, I’m getting the error:

==> invalid character 'T' after object key:value pair

I’m not sure how to debug this error! This is everything I’m able to get out of the sidecar proxy container.

The consul agent appears to be running properly.

Any clues about what may be wrong, or how I can find out where the issue is?