RTL: Password Validation Failed with custom auth type

Describe the bug I’m trying to connect RTL running in a docker container to an lnd instance running in another docker container. With NODE_AUTH_TYPE set to CUSTOM and RTC_PASS set to a simple string, after starting up the container (shahanafarooqui/rtl:0.5.2) I get the message rtl_1 | Server is up and running, please open the UI at http://localhost:5000 then access the dashboard (which looks normal) but then when enter my password I get an error:

ERROR: Authenticate(54) => Password Validation Failed!

Your environment I’m using btcd and lnd for the backends, docker images based on their latest builds