Saw the tweet about your beta this morning and started kicking the tires a bit and stumbled into this error when loading up the Functional Equivalence tool in the Notebooks Playground.
Error Loading WDL
HTTP ERROR 404
Problem accessing /api/ga4gh/v1/tools/%23workflow%2Fgithub.com%2FDataBiosphere%2Ftopmed-workflows%2FFunctional_Equivalence/versions/1.0.0/WDL/descriptor. Reason:
Not Found : incorrect id
NBD, but I thought I'd pass it along in case you weren't already aware.
The rest is looking pretty snazzy though - congrats on getting the beta out!