3676744 - Unable to access to content repository SOFFDB in CSADMIN due to credential popup

When access to content repository SOFFDB in CSADMIN, credentials(user and password) are required by a popup titled with 'SAP NetWeaver Application Server [SID/client].

When test content repository SOFFDB with report RSCMST in SE38:

header        HTTP/1.1 401 Unauthorized
              set-cookie: sap-usercontext=sap-client=100; path=/
              content-type: text/html; charset=utf-8
              content-length: 61
              x-errordescription: Error SSF: Descodificaci#n imposible
              sap-server: true
              sap-perf-fesrec: 13988.000000
              sap-original-protocol: h2
              ~remote_addr:
              ~uri_scheme_expanded: NONE
body          Error SSF: Descodificación imposible
want                 200
bad           401
time              18.806

Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental.

All SAP R/3 release.

Error SSF: Descodificaci#n imposible, SOFFDB, HTTP/1.1 401 Unauthorized, CSADMIN, HTTPS on frontend, HTTPS on backend. , KBA , BC-SRV-KPR , Knowledge Provider , Problem