I can see that you're using the semicolon as the separator here. When importing data from data management, the file needs to be a comma-separated CSV or the fields won't be inferred correctly.
You could try again after replacing the semicolons with commas. Bear in mind that this route is only valid for files up to 1 MB in size.
Alternatively, you could also explore our S3 connector or the Bulk API channel to load data into Gainsight where you have the option to specify the semicolon as the separator. Details about those routes can be found here: S3 Connector Bulk API
It is also highly recommended to make sure all fields are quoted to avoid data anomalies.