Can't upload xlsx file 32kb

I just deployed Grist to a k8s cluster and also tried it in docker. In docker I can import a 32kb xlsx file without issue. However in k8s I am getting a 503 error with this and all excel files I try to import. The log has a warn: client error stack=UserError: Upload failed: 503 at XMLHttpRequest. (https://grist.apps.com/v/unknown/main.bundle.js:2:232472), …

I know this is not an ingress size issue since I have jupyter hub deployed and also minio and both can upload much larger files in the same cluster.

Thoughts on what I have misconfigured?

How do things look on the /admin page, any warnings or all clear?