R kernel error in Jupyter Notebook

I operate in a Windows 11 environment. I have upgraded my Anaconda Individual Edition to version 2.1.1. I have also upgraded R to version 4.1.2. Now my R Jupyter Notebook is giving a kernel error. The R environment in Anaconda Navigator uses the 3.6.1 as the latest version of R. The R Jupyter Notebook used to work when I had R version 4.0.3. The Python notebook still works. The earliest R installation on my laptop is 4.0.1. Any suggestions?