Unable to upload via browser

Has anything changed in uploading files via the browser? or is there a temporary outage?
After dragging the files (small bam files from my local PC), there is a rolling circle but upload does not begin.
Thanks for your help

There were some server issues around the time this question was asked. All should be resolved by now.

Historical and ongoing usegalaxy.* server status: https://status.galaxyproject.org/