The tms-config-test.postman_collection.json from the dev branch still contains errors. Is this a known issue?

Yes. Community members have reported that the test collection on the dev branch still has some issues (e.g., field 'credttm' not found). This was acknowledged by the team as a known gap and filed as a GitHub issue. Monitor https://github.com/tazama-lf for updates or use the full-service configuration collection (tms-config.postman_collection.json) in isolation while the test collection is corrected.