Excel import issue: Unable to connect to Excel, make sure given file is an valid Excel file
For this kind of issue, we generally recommend to install the driver [ https://www.microsoft.com/en-us/download/confirmation.aspx?id=13255 [Access database engine (Engine 2010)] but in this case, it is not helping.
User had installed it in the server and restarted it. But still we find the same error.