Not able to load the the .ipynb file in Jupyter notebook

Hi Team,
I was working on my notebook, running a pytorch forecasting model. I encountered some error, probably something with shape of my tensors. I went to read about it and to find a way to troubleshoot it. in just 10 minutes i went back to correct and saw(The page is having a problem error) and since then i was not able to load that .ipynb file to jupyter notebook and i also tried google colab. Upon careful looking only odd thing i found is that file(my .ipynb) is 300mb file.

Can anyone help me with this issue?