You are attempting to access a data share and after providing your login credentials you receive a message: Login failed with the following reason: Unable to authenticate due to the following issue: invalid_client
The import data window then comes up and your data share reads (unavailable).
The Delta Sharing application may not be authorized within your company's Entra tenant. An Entra administrator must authorize both the Delta Sharing and Exponam.Connect applications in your tenant.
Refer your administrator to this support article for more information:
Managing User authentication and access