Here is a more complete console log:

[CODE]Uploading avtr.png
attachment_editor.js?_v=5c8fb20e:16 Uploaded 0/191720 bytes.
attachment_editor.js?_v=5c8fb20e:16 Uploaded 85560/191720 bytes.
attachment_editor.js?_v=5c8fb20e:16 Uploaded 88412/191720 bytes.
xenforo.js?_v=5c8fb20e:288 OverlayLoader for posts/1046721/edit-inline
attachment_editor.js?_v=5c8fb20e:16 Uploaded 65596/191720 bytes.
attachment_editor.js?_v=5c8fb20e:16 Uploaded 102672/191720 bytes.
swfupload.min.js?_v=5c8fb20e:1 POST https://xenforo.com/community/attachments/do-upload.json?hash=blablabla&content_type= post net::ERR_CONNECTION_RESETSWFUpload.callFlash @ swfupload.min.js?_v=5c8fb20e:1SWFUpload.returnUploadStart @ swfupload.min.js?_v=5c8fb20e:1(anonymous function) @ swfupload.min.js?_v=5c8fb20e:1SWFUpload.executeNextEvent @ swfupload.min.js?_v=5c8fb20e:1(anonymous function) @ swfupload.min.js?_v=5c8fb20e:1
attachment_editor.js?_v=5c8fb20e:12 Upload failed: [Object, -220, "Error #2038"]
xenforo.js?_v=5c8fb20e:223 XenForo.activate([div.xenOverlay.__XenForoActivator, prevObject: e.fn.init[1], context: undefined])
attachment_editor.js?_v=5c8fb20e:17 AttachmentUploadError: n.Event
attachment_editor.js?_v=5c8fb20e:12 All files uploaded.
attachment_editor.js?_v=5c8fb20e:14 Attachments changed, total files: 0, images: 0[/CODE]