Expression.Error to expand a list

[Valdirf]

I have a List type field in a PowerBI table. When I expand this field in Power Query and apply the changes, I receive the following message:

OLE DB or ODBC error: [Expression.Error] Parameter was expected to be of type Text.Type or Binary.Type.

I would like to know what could be happening in this expansion?

[Valdirf]

Hi, Ibelndlin. Thanks for answer. THe issue was related a change in the database. Once we updated the queries for avoid old data (with the old collumns) the report works

Thanks for you attention

[lbendlin]

Are you sure that's where the error originates?