Think I found a typo in the error message. Trying to load OData table with too many columns.
"DataSource.Error: OData: Request failed: The remote server returned an error: (400) Bad Request. (VS403483: The query specified in the URI is not valid: VS403670: The specified query retruns 964 columns which is higher than the allowed limit of 800 columns. Please, use explicit $select (including within the $expand) options to limit number of columns..)"
"Retruns" should be "returns".
I tried to restore the error message you mentioned, but it failed. If you think the wrong translation is affecting your experience, you can raise a support ticket, and a special engineer will follow up your problem.
The link of Power BI Support: https://powerbi.microsoft.com/en-us/support/
For how to create a support ticket, please refer to https://community.powerbi.com/t5/Community-Blog/How-to-create-a-support-ticket-in-Power-BI/ba-p/6830...
Community Support Team _ Ailsa Tao