Hi, I tried on different computers the nightly build for jupyter >=4. In all cases the DISK I/O BANDWIDTH and NETWORK I/O BANDWIDTH graphs are empty.  Tested on Ubuntu 22.04 and on a SLURM cluster running JupyterLab inside an Singularity container. ``` import psutil # Get CPU usage cpu_usage = psutil.cpu_percent(interval=1) print(f"CPU Usage: {cpu_usage}%") # Get memory usage memory_info = psutil.virtual_memory() print(f"Memory Usage: {memory_info.percent}%") ``` returns ``` CPU Usage: 3.2% Memory Usage: 2.0% ```