There was no problem yesterday, but there is a problem today.
I tried delete and re-upload my datasets, but dont work
https://platform.ultralytics.com/jiesou/datasets/robotwy
This looks more like an Ultralytics Platform backend 500 than a dataset formatting issue, especially since it was working yesterday and re-uploading didn’t help.
Please first confirm your dataset still has a train split and that your billing balance is positive, since both are called out in the Platform troubleshooting guide. If both look fine, then it’s likely on the Platform side.
Please reply with the exact train config you selected and the approximate UTC time of the failure, and also try a hard refresh or a different browser once. If you can, open DevTools → Network and paste the response body for the failed train request too.
1 Like
HTTP 500 occurred on the Ultralytics Platform cloud training machine side, not on the browser client side. So, the DevTools Network tab contains little useful information, change to a different browser / hard refresh also don’t work.
Also, it’s an HTTP 500 error during the dataset download process on the cloud, it can only be seen through the “Console” on the Ultralytics Platform.
I just reproduced this issue again:
Public Project Link: https://platform.ultralytics.com/jiesou/robotwy/exp-4?tab=train
Training Start Time: 2026.05.09 UTC 14:12
Training Datasets: https://platform.ultralytics.com/jiesou/datasets/myrobotwycoco
Full Training Configuration: (basically, it’s default, with yolo11n-pose + 200 epochs)
{
"task": "pose",
"mode": "train",
"model": "ul://ultralytics/yolo11/yolo11n-pose",
"data": "ul://jiesou/datasets/myrobotwycoco",
"epochs": "200",
"time": "None",
"patience": "100",
"batch": "-1",
"imgsz": "640",
"save": "True",
"save_period": "-1",
"cache": "False",
"device": "5",
"workers": "8",
"project": "jiesou/robotwy",
"name": "exp-4",
"exist_ok": "False",
"pretrained": "True",
"optimizer": "auto",
"verbose": "True",
"seed": "0",
"deterministic": "True",
"single_cls": "False",
"rect": "False",
"cos_lr": "False",
"close_mosaic": "10",
"resume": "False",
"amp": "True",
"fraction": "1.0",
"profile": "False",
"freeze": "None",
"multi_scale": "0.0",
"compile": "False",
"overlap_mask": "True",
"mask_ratio": "4",
"dropout": "0.0",
"val": "True",
"split": "val",
"save_json": "False",
"conf": "None",
"iou": "0.7",
"max_det": "300",
"half": "False",
"dnn": "False",
"plots": "True",
"end2end": "None",
"source": "None",
"vid_stride": "1",
"stream_buffer": "False",
"visualize": "False",
"augment": "False",
"agnostic_nms": "False",
"classes": "None",
"retina_masks": "False",
"embed": "None",
"show": "False",
"save_frames": "False",
"save_txt": "False",
"save_conf": "False",
"save_crop": "False",
"show_labels": "True",
"show_conf": "True",
"show_boxes": "True",
"line_width": "None",
"format": "torchscript",
"keras": "False",
"optimize": "False",
"int8": "False",
"dynamic": "False",
"simplify": "True",
"opset": "None",
"workspace": "None",
"nms": "False",
"lr0": "0.01",
"lrf": "0.01",
"momentum": "0.937",
"weight_decay": "0.0005",
"warmup_epochs": "3.0",
"warmup_momentum": "0.8",
"warmup_bias_lr": "0.1",
"box": "7.5",
"cls": "0.5",
"cls_pw": "0.0",
"dfl": "1.5",
"pose": "12.0",
"kobj": "1.0",
"rle": "1.0",
"angle": "1.0",
"nbs": "64",
"hsv_h": "0.015",
"hsv_s": "0.7",
"hsv_v": "0.4",
"degrees": "0.0",
"translate": "0.1",
"scale": "0.5",
"shear": "0.0",
"perspective": "0.0",
"flipud": "0.0",
"fliplr": "0.5",
"bgr": "0.0",
"mosaic": "1.0",
"mixup": "0.0",
"cutmix": "0.0",
"copy_paste": "0.0",
"copy_paste_mode": "flip",
"auto_augment": "randaugment",
"erasing": "0.4",
"cfg": "None",
"tracker": "botsort.yaml",
"save_dir": "/ultralytics/runs/pose/jiesou/robotwy/exp-4"
}
No problem before. But all the new training attempts always failed (and I have deleted several other failed attempts).
Thanks for reporting. We will investigate.
1 Like