`yarn appr` returns "Error starting tunnel"

[marcdel]

Error starting tunnel: Error: {"status_code":400,"msg":"failed to deserialize request parameter","details":{"err":{"Type":{}}}}

Running yarn appr gives an error. It publishes the pr branch to the main expo project (in this case https://exp.host/@marcdel/cheese-log), but the returned QR code is invalid because the PR branch "experience" is unavailable (exp://exp.host/@marcdel/cheese-log-add-appr).

You can see the associated build here.
https://travis-ci.org/solid-af/cheese-log#L277