DataSource.Error: The downloaded data is HTML, which isn't the expected type. The URL may be wrong or you might not have provided the right credentials to the server.
This is likely related to a security configuration issue and/or your username or password is incorrect.
Resolution
Attempting to login to AcceleratorKMS more than five times with an incorrect username
and password will lock the account. Once locked, it must be reset by an Administrator.
Each attempt, from a query or a user, is counted the same. For example, three attempts
from a query and two from a user are considered to be five attempts.
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Verify the AcceleratorKMS username and password in the query are correct.
Test them by copying them from the query and pasting them into the AcceleratorKMS login page.
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In the upper-left corner of the screen of the main Power BI® window, click File > Options and Settings > Data Source Settings.
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Multiple data sources might be present. Select the data sources you are not using or the ones that are giving you errors, and click clear permissions for each.
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If clearing permissions for a specific data source does not resolve the problem, then Clear All Permissions.
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Reset each cleared permission.