Hi everyone!
We have received 2 reports of a strange issue in 5.1.0rc1 in which an error dialog reading "Can't make callback from given data" is displayed on loading of a notebook. If you have encountered this error, please share your observations with us so that we can get to the bottom of it. See
#2747 for more details.
We have just published notebook 5.1.0rc2 to
PyPI. This includes a couple bug fixes since rc1.
To install:
pip install notebook --upgrade --pre --force-reinstall
Please give it a try and if you encounter any issues, please file an issue on Github.
Thanks!