Your shell has not been properly configured to use 'conda activate

This error message usually appears when you are trying to activate a conda environment from within a shell that has not been properly configured to use conda. To fix this issue, you can try the following steps:

1. Make sure that you have installed conda properly and that it is added to your system's PATH environment variable.

2. Open a new terminal window and try activating the conda environment again using the `conda activate` command.

3. If the error message persists, you can try adding the following line to your shell startup file (e.g. .bashrc or .zshrc):

   conda init <SHELL_NAME>

Replace `<SHELL_NAME>` with the name of your shell (e.g. bash or zsh).

4. After adding the above line to your shell startup file, close and reopen your terminal window, and try activating the conda environment again using the `conda activate` command.

If none of these steps work, you may need to consult the conda documentation or seek help from the conda community to troubleshoot the issue further.