@GeneralChingChicken, you cannot use latest Appium version, but to downgrade it.
Try this command for specific version:
npm install -g appium@1.8.1
Check Katalon supported versions here.
Also, read here further details in relating to above npm command.
After npm install appium, you can then installing appium-doctor as I find this useful to help you resolved any other dependent issues or installer.
Cheers.