Hey, everyone. I'm having problems completing a Trailhead Challenge: Assess the Quality of Data: Install the Data Quality Analysis Dashboards App

I screenshot my steps from Launch to Allowing Access. When I click to Allow Access and Login, it takes me to an Url No Longer Exists screen. Unsure how to proceed. Thanks in advance and screenshots are below:

1. I select "Launch."



2. Find the App. Select "Get it now."



3. Select "Open Login Screen."



4. Select "Allow."



5. This is where I get stuck. I keep getting the message the "Url No Longer Exists."


* Thanks in advance - I imagine it must be something simple I am missing. Just can't figure out what I am missing though.

I'm getting the following error when Checking the challenge for the Enable Salesforce Knowledge component of the Knowledge Basics module in Trailhead even though everything is set up correctly according to the article. Knowledge is enabled, the language is set and the user has the appropriate permission. What am I missing?