Error while saving the test data

What causes this issue?

An error occured when the test data was being stored.

System Response

The test data was not exported.

How to fix this error?

The test environment of the Function Builder possibly cannot correctly
depict complex types so that you can read/write such data on the
test database.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.