Hi Kjell Gullberg,
Thank you for reaching out to us on the Microsoft Q&A forum.
After selecting "Get Apps," search for "Sales and Marketing." You should find the app and the PBIX file. To install the app, select it. If you want to open the Sales and Marketing PBIX file, select the PBIX file.
We tested this on our end, and everything is working fine. Kindly refer to the screenshots below.
You can also find a download link on the official Microsoft page: https://learn.microsoft.com/en-us/power-bi/create-reports/sample-sales-and-marketing?source=recommendations
If you are still facing any issues, please let us know in the comments with details of where you're encountering the problem, along with a screenshot for reference. We're happy to assist you.
Also, if this answer was helpful, please click "Accept Answer" and mark "Yes" under "Was this answer helpful?" This can be beneficial for other community members as well.
Thank you.