Jupyter finds python kernel but can't find Sage kernel.
SageMath version 9.5 release 30_1_2022 , using Python 3.11.6, everything seems to work but Jupyter stays sme time trying to connect to Sage Kernel without success.
which OS ?
I ask this question because I encountered this problem with W11 WSL Ubuntu22.04 returning from Windows 11 standby.
Do you mean Sage's Jupyter (i. e. the one living under your $SAGE_ROOT directory) or the system's Jupyter (installed, e. g., by installing the relevant Ubuntu package(s)) ?
iIn the latter case, see this documentation in order to install a pointer to the Sage kernel in your system's Jupyter.
More generally, perusing the Installation guide may be useful...