Storing data source credentials times out

[hellopath]

I'm experiencing the following problem:

- We created an Azure SQL database and put some dummy data in.

- In Power BI Desktop we add the data source and create a sample report.

- We publish to Power BI service.

- In the browser, we can look at the report. But when we try to refresh the data source, it tells us that our credentials are wrong.

- Now, when I try to enter the credentials, nothing happens for many minutes and it appears to time out.

Does anyone have an idea for what could be causing this issue?