[Python] Can't load my YOLOv8n model, trained on custom dataset

I use Ultralytics YOLOv8 with the model, trained on custom dataset, and run the following python code:

import cv2
from ultralytics import YOLO

model = YOLO("/home/github/ultralytics/ultralytics/runs/detect/train3/weights/best.pt")


and get this error:

requirements: YOLOv8 requirement "ultralytics.nn.modules.conv" not found, attempting AutoUpdate...
ERROR: Could not find a version that satisfies the requirement ultralytics.nn.modules.conv (from versions: none)
ERROR: No matching distribution found for ultralytics.nn.modules.conv
requirements: ❌ Command 'pip install "ultralytics.nn.modules.conv" ' returned non-zero exit status 1.


Tried to run :

pip install --upgrade ultralytics


Tried different conda Python environment (v3.8.8, v3.10.14), and got the same results

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