sharepoint online – Export Managed Metadata from List to CSV

I’m trying to export an SPO list into CSV, which is working fine for Single line of text fields, however, when trying to export a managed metadata field, I’m getting the following appear in the CSV for the column:

System.Collections.Generic.Dictionary`2[System.String,System.Object]

The script I am using is from this website http://www.sharepointdiary.com/2016/03/export-list-items-to-csv-in-sharepoint-online-using-powershell.html.

How can I modify the script to show the value of the managed metadata field?

Thanks.