Renaming and "save as" feature on MacOS

Thank you very much for the development of this wonderful tool. I used it a lot in class and pupils like it. I have installed the desktop lite version on MacOS. I'm just struggling with the fact that I can't manage to rename a notebook, I get the following error message : Cannot create property 'v' on string '{"path":"new_filename.ipynb"}'. Therefore, when I "save as" the file I get a file "Untitled.ipynb" which I have to rename afterward. Is there a way to overcome that little issue ?

Thanks again.