Trouble with build on LightDB stream sample

I am building the LightDB sample for the Thingy91, based on this repository:

I’m using the VS Code extension for NCS and I think I have everything configured correctly. When I try to build though, I get an error that CONFIG_MBEDTLS_PSK_MAX_LEN is not configured. I checked the prj.conf and I don’t see it in there for the sample, but maybe it needs to be added manually?

Tried building again today, got the same error:

Looks like this change was added recently?