Rstudio defaulting to the Python kernel

I am having an issue with my Quarto website project. I always use the R kernel in rstudio on both of my computers, but when I reopened my project on my other computer, it seems to be defaulting to the Python kernel, causing the following error when I render for website:

Starting python3 kernel...Traceback (most recent call last): File "/Applications/", line 21, in <module> from notebook import notebook_execute, RestartKernel File "/Applications/", line 17, in <module> import nbformat ModuleNotFoundError: No module named 'nbformat' Python 3 installation: Version: 3.11.2 Path: /Library/Frameworks/Python.framework/Versions/3.11/bin/python3 Jupyter: (None)

Jupyter is not available in this Python installation. Install with python3 -m pip install jupyter

I have tried some solutions, including:

  1. Adding the kernel:ir option to the top of the .quarto.yml file
  2. Restarting RStudio to make sure that changes to the .quarto.yml file are being picked up correctly
  3. Checking the project options in RStudio to make sure that the correct kernel is selected but I can't find the specific quarto options there or in the global options
  4. in the console or in the environment tab, it looks like R is being used.

Does anybody have any ideas on how to change it back to the r kernel when I render for websites?


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