Can't add s3 bucket

[jwikiera]

I have a blazeback public bucket. When I try to add it, I get this in the js console (both firefox and chromium):

Uncaught (in promise) TypeError: PromiseResolve called on non-object
    at resolve (<anonymous>)
    at index-C2DFLI20.js:176:313011
    at index-C2DFLI20.js:176:84338
    at index-C2DFLI20.js:176:81324
    at index-C2DFLI20.js:115:129301
    at H3 (index-C2DFLI20.js:48:125671)
    at index-C2DFLI20.js:48:131067
    at aF (index-C2DFLI20.js:48:16994)
    at XT (index-C2DFLI20.js:48:126991)
    at u_ (index-C2DFLI20.js:49:26140)

There are no request being made, as no activity shows up in the network tab. There are also no logs server-side. I use docker compose (image: elevenam/frames:latest).