Sentinel s2 l1c - 502 error by cloudfront - Unable to access meta-files and preview image from http

As of today (or yesterday?), I can’t access the some products anymore. E.g. for https://roda.sentinel-hub.com/sentinel-s2-l1c/tiles/16/R/BV/2018/4/16/0/, I get a 502 Error:

502 ERROR

The request could not be satisfied.

The Lambda function returned an invalid entry in the headers object: The header must have a value field.
If you received this error while trying to use an app or access a website, please contact the provider or website owner for assistance.
If you provide content to customers through CloudFront, you can find steps to troubleshoot and help prevent this error by following steps in the CloudFront documentation (https://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/http-502-bad-gateway.html).

Generated by cloudfront (CloudFront) Request ID: 4H2Yz-s1R4J7YHYMWd4x8Wyiah2N6X6Xi0C-4E3InA7MvLG_N9_S6Q==")

Whats weird is that the metadata files (e.g. https://roda.sentinel-hub.com/sentinel-s2-l1c/tiles/16/R/BV/2018/4/16/0/tileInfo.json) seem to work, but not the images (e.g. https://roda.sentinel-hub.com/sentinel-s2-l1c/tiles/16/R/BV/2018/4/16/0/preview.jpg), which is a problem for us.