Patternfly React Bacis Tutorial broken

On https://www.katacoda.com/patternfly/courses/react/react-basics, on Step 2, I get the following error:

./node_modules/@patternfly/react-core/dist/esm/components/Popover/Popover.jsModule not found: Can't resolve '@patternfly/react-styles/css/components/Tooltip/tippy-overrides.css' in '/root/node_modules/@patternfly/react-core/dist/esm/components/Popover'

Thank you for reporting this @Sumpfgottheit - we recently made updates to the Popover component which may be causing this error to be thrown. I’ve filed an issue for this here: