Hi @Lakshman Dirisala ,
Thank you for posting query in Microsoft Q&A Platform.
You mentioned that you have user administrator
access. Assuming its not typo, It seems its not built-in User Access Administrator
which is available at subscription level.
Could you please try to get User Access Administrator
role at subscription level and retry? Please let us know how it goes.
Below few links where similar details discussed:
https://video2.skills-academy.com/en-us/answers/questions/29512/devops-pipeline.html
https://developercommunity.visualstudio.com/t/permission-authorising-release-pipeline-against-su/370952
Hope this helps. Please let us know if any further queries.
--------
Please consider hitting Accept Answer
button. Accepted answers help community as well.