Resolving the "ERR.DS_API.US.BAD_REQUEST data.key should not start with /" error
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Updated at November 27, 2023
Issue description
When creating a connection, you see the ERR.DS_API.US.BAD_REQUEST error.
Solution
This error may arise when you try to create a connection at the root of the DataLens hierarchy (inside the All Objects folder).
Specify a folder with a different name in the pop-up window opened by the Create connection button.