Error on apply Power Query: Expression in partition n/a in table n/a references an unknown entity

Hi Anonymous, 

Please modify the URL in your Power Query like below then try it again: 

let
Source = AzureStorage.DataLake("https://xxxxx.dfs.core.windows.net/contoso-retail-dw/rssfeed/rawdata/date=" & ""&DateTime.ToText(Date.AddDays(DateTime.LocalNow(), -1), "yyyy-MM-dd")&""),

Best Regards,
Qiuyun Yu

same error...

I get the same error with an on-premise SQL Server source. Even if I simply duplicate a working query, the new duplicate causes this error.

Tried also this - also does not work! (PowerQuery Preview perfect, "Apply" gives error):

let
DateString = DateTime.ToText(Date.AddDays(DateTime.LocalNow(), -1), "yyyy-MM-dd"),
#"SourceString" = Text.Combine({"https://xxxxxxx.dfs.core.windows.net/contoso-retail-dw/rssfeed/rawdata/date=", DateString, "/data"}),
#"Source" = AzureStorage.DataLake(SourceString),

Hi all, 

Please update Power BI desktop to the latest version 2.79.5768.1082 then test again. 

Best Regards,
Qiuyun Yu

Same error!!!
I made a completly new report with latest version.
This desperate guessing does not help, please come up with a solution!

Updated, but still encountering the same error.

Hi all, 

Please create a support ticket to let engineers look into the issue on your side. 

Best Regards,
Qiuyun Yu

In our case, this problem seems related to enabling the "Enhanced Metadata Format" preview feature on an existing dataset.

Same here! The "enhanced metadata format" preview feature has some sort of critical bug in it. It will mess up your PBIX file and I could not reverse it by simply turning the feature back off. I had to revert to a previous version. Thankfully, we use source control and I had one.