File Save Error on large files

I’m using Jupyter Lab v2.1.4 through JupyterHub v1.1.0.
I noticed that when notebooks get larger (like more than 3Mb) I’m getting the File Save error, this can happen for instance if I’m using interactive graphs like Plotly.
Is there a way to increase the timeout for saving the notebook or getting more information about the error ?
Thanks in advance