Azure DevOps release pipeline error Path must be a string Received undefined

[PhilBlackRose]

Attempting to use the Yuniql marketplace add-in for Azure DevOps.
Agent pools and deployment group targets are self-hosted Windows Server 2022 21H2
Works fine in build pipeline.
Now in release pipeline, added a deployment group job with 'verify yuniql' task.
Configured accordingly. No input fields are undefined.
Running the pipeline results in error in log:

2025-02-10T13:55:09.9241622Z ##[section]Starting: Verify Yuniql
2025-02-10T13:55:09.9260969Z ==============================================================================
2025-02-10T13:55:09.9261147Z Task         : Verify yuniql
2025-02-10T13:55:09.9261221Z Description  : Runs an uncommitted database migrations with Yuniql CLI using version acquired from Use Yuniql task.
2025-02-10T13:55:09.9261427Z Version      : 1.190.0
2025-02-10T13:55:09.9261499Z Author       : Rodel E. Dagumampan
2025-02-10T13:55:09.9262421Z Help         : https://yuniql.io/docs/migrate-via-azure-devops-pipelines/
2025-02-10T13:55:09.9262846Z ==============================================================================
2025-02-10T13:55:10.6716954Z yuniql/input_version: latest
2025-02-10T13:55:10.6717560Z yuniql/input_workspacePath: C:\azagent\A2\_work\r1\a\_myartefact\_myartefact\postgres\mydb
2025-02-10T13:55:10.6718576Z yuniql/input_connectionString: Server=myserver;Port=5432;Database=mydb;User Id=myuser;Password=***;
2025-02-10T13:55:10.6719105Z yuniql/input_targetPlatform: postgresql
2025-02-10T13:55:10.6719574Z yuniql/input_autoCreateDatabase: true
2025-02-10T13:55:10.6719946Z yuniql/input_targetVersion: latest
2025-02-10T13:55:10.6720493Z yuniql/input_tokenKeyValuePair: ENV=beta
2025-02-10T13:55:10.6721124Z yuniql/input_delimiter: ,
2025-02-10T13:55:10.6722050Z yuniql/input_additionalArguments: --debug
2025-02-10T13:55:10.6722733Z yuniql/var_osPlat: win32
2025-02-10T13:55:10.6723394Z yuniql/var_osArch: x64
2025-02-10T13:55:10.6762287Z yuniql/error: Path must be a string. Received undefined
2025-02-10T13:55:10.6784846Z ##[error]Path must be a string. Received undefined
2025-02-10T13:55:10.6841200Z ##[section]Finishing: Verify Yuniql