Not able to sync with Excel Power Query

Same as the above issue. Using Excel PowerQuery, API the following errors is happening using the instructions here:
Details: "Web.Contents failed to get contents from '' (404): Not Found"

These steps always worked for me before today. The issue seems to be only with Excel as it seems to work using PowerBI.

Welcome to the community, @Karolina! Have you gone through our support article Pulling Data Into Excel Power Query? If no, maybe it would be helpful for you to understand what is not working.

Clue: Maybe you have not made your data public? Try making it public. That should solve your issue.