Error applying merged queries "sequence contains no element"

Hi,

I'm trying merging two queries. It should be a quite simple operation.

I'm merging a customer table and a price table (holding customer, price and item no).

In the editor my result looks fine, giving me the result I need, but when I Close and Apply Power BI throws  "sequence contains no element".

I'm a bit stucked here. Help is much appreciated

thanks

alme Can't comment until we see the actual error message or any sample data to replicate the same. Please try to post the sample data of both tables that you are trying to merge in a copiable format.