We recently migrated our backend to ARM64, and it's working great. However, when we run our tests via Bitbucket Pipelines, it refuses to even get started. We followed the example shown in last year's post. The code is below. When we invoke the pipeline, the error we get says "Currently no online runner available that matches the required labels."

Has anyone run into this before? Is it simply a matter of low capacity?
Abridge bitbucket-pipelines.yml below:
image:
name: xxx.dkr.ecr.us-east-1.amazonaws.com/peanutbutter:validtag # This is an ARM64 image that works in production
aws:
access-key: $AWS_ACCESS_KEY_ID
secret-key: $AWS_SECRET_KEY
pipelines:
branches:
master:
- step:
runs-on:
- self.hosted
- linux.arm64
caches:
- pip
script:
- python manage.py test --failfast -v 2 # --settings settings.testing