Release : 4.10
Component : Web Portal - Data Modeling
Teradata version 16.20 shows to be a supported data source for TDM 4.10 for data generation (TDM Portal and Datamaker) and subsetting only (data masking can be done with subset scripts).
https://techdocs.broadcom.com/us/en/ca-enterprise-software/devops/test-data-management/4-10/installing/supported-data-sources.html
Teradata 16.20:
** Teradata Notes **
* For all Teradata databases you can mask data using GT Subset scripts in Datamaker.
The reason the error is seen in Portal for the Data Model is because this feature is not supported for all Teradata databases. This is the same in TDM 4.8 through 4.10.