@jensolsson-se hello, sorry the notification slipped through the cracks.
the current fashion in S3 bugs at the moment is in the backups, and the stacktrace clearly shows our code:
"stack": "Error: Error calling AWS.S3.upload: write ECONNRESET\n
at rethrow (/home/xoa/xen-orchestra/node_modules/@sullux/aws-sdk/index.js:254:24)\n
at runMicrotasks (<anonymous>)\n at processTicksAndRejections (internal/process/task_queues.js:95:5)\n
at async S3Handler._outputStream (/home/xoa/xen-orchestra/@xen-orchestra/fs/dist/s3.js:100:5)\n
at async S3Handler.outputStream (/home/xoa/xen-orchestra/@xen-orchestra/fs/dist/abstract.js:250:5)\n
at async RemoteAdapter.outputStream (/home/xoa/xen-orchestra/@xen-orchestra/backups/RemoteAdapter.js:509:5)\n
at async /home/xoa/xen-orchestra/@xen-orchestra/backups/writers/FullBackupWriter.js:69:7"
I am extremely puzzled by the stacktrace you posted, the "websocket" keyword almost suggest that the server tried to answer to the browser, but the TCP socket had been closed.
what do you have in the backup log ?
This circled button copies a very long detail of the error to the clipboard, you can paste it in a text editor and have a look.