[FTS] Keeps restarting with "FATAL: error: could not connect to server ("http://127.0.0.1:8091"), err: HTTP error 401 Unauthorized getting "http://127.0.0.1:8091/pools""

Build
4.7.0-784
Seems to be a regression after 4.7.0-770 on the auth side.

All tests in dgm suite(I don't know yet why other tests are running fine) seem to be failing with multiple restarts of FTS with the following reason -

FATAL: error: could not connect to server ("http://127.0.0.1:8091"), err: HTTP error 401 Unauthorized getting "http://127.0.0.1:8091/pools"

Sample test case-
./testrunner -i INI_FILE.ini get-cbcollect-info=True,get-coredumps=True,get-logs=False,stop-on-failure=False,cluster=D:F:F,GROUP=DGM -t fts.stable_topology_fts.StableTopFTS.create_simple_default_index,cluster=D,F,F,dgm_run=1,active_resident_ratio=80,GROUP=DGM

Attaching logs and screenshots.