While running the htttpbb tests in production I found an issue with the following test:
https://enwiki-articletopic.revscoring-articletopic.wikimedia.org/v1/models/enwiki-articletopic:predict (/srv/deployment/httpbb-tests/liftwing/test_liftwing_production.yaml:114)
Status code: expected 200, got 500.
Body: expected to contain 'probability', got '{"error":"An error happened while fetching feature'... (133 characters total).