Location of LMS MFE error logs

I’m trying to track down a runtime error related to a custom xblock that was originally built on Nutmeg, before MFEs. I’m now running the master build of Redwood. It looks like the code in

is calling logError, but I cannot track down where errors generated in the javascript MFE code are being sent. The platform is built with ‘tutor local build’, not ‘tutor dev build’. The errors don’t appear in the user’s browser console. Anyone know how to track down the logging configuration to determine where those log entries are are going? The logging configuration has a lot of options. Advice is appreciated.