Server error: OK - Notebook

[Gilg]

Hi 

I am currently having a weird notebook behavior. Every time I write, I am getting the following error. 

My gut feeling is that it causes by the Auto-save feature.

Cheers,

Gil

[Gilg]

Not sure about the size of the notebook, as this happening in a brand-new notebook.

Edited: I could not find the Save button in the notebook toolbar.