Hey guys,
Could you please suggest what to check for my issue?
I'm doing some labs on OAM (ps3, no OIM, ID store is in OUD), and it has webgate configured with DCC with password policy. Authentication works fine, account lock works fine as well. But when I set a flag in OUD for an account to change its password, DCC displays password change page, but on submit it fails with the following error (Oracle Access Manager Error Unable to process the request due to unexpected error.)

I checked oblog.log and it has following lines for the password change request. It's definitely an indication of the problem. I just have no clue how to proceed in debugging from this point
2016/05/15@17:37:23.63154 4853 4878 ACCESS_GATE WARNING 0x0000151E /ade/aime_ngamac_110154/ngamac/src/palantir/webgate2/src/redirect.cpp:2110 ecid^005CiJpvzd1Fw00Fzzx0g00001BQ000005 rid^0 "Invalid authn token, OAMAuthnCookie, or DCCCtxCookie" pszMap^salt=WqFNU/MAtkRRLDr/HkZdiA== wh=webgate_2 wu=%252Findex.html wo=1 rh=http://identity.oracleads.com:7778 ru=%252Findex.html if=1 svrhandle= affn=false validate=DzFBhB6btbDVob0dVKgbNA== crmethod=0 svrctx=EA6 .... <skipped for brevity> .....2DE7 validate^DzFBhB6btbDVob0dVKgbNA== calcHash^4b+lqI3PdNi8vaQSSdS7KQ== _criterion^MAC Hash
2016/05/15@17:37:23.63173 4853 4878 ACCESS_GATE ERROR 0x00001531 /ade/aime_ngamac_110154/ngamac/src/palantir/webgate2/src/redirect.cpp:1720 ecid^005CiJpvzd1Fw00Fzzx0g00001BQ000005 rid^0 "The obrareq.cgi, obrar.cgi, DCCCtxCookie, logout redirect message, or any other encrypted string has failed integrity check." HTTPStatus^400 reqInfo.GetRequestUrl()^/oam/server/auth_cred_submit
2016/05/15@17:37:23.65379 4853 4878 WEB ERROR 0x0000151F /ade/aime_ngamac_110154/ngamac/src/palantir/commonlib/src/apache2_req_info.cpp:285 ecid^005CiJpvzd1Fw00Fzzx0g00001BQ000005 rid^0 "WebGate Error Report" Message^Unable to process the request due to unexpected error. ReqReq^POST /oam/server/auth_cred_submit HTTP/1.1 ReqProto^HTTP/1.1 ReqHost^identity.oracleads.com ReqStatLine^ ReqStatus^200 ReqRawUri^/oam/server/auth_cred_submit ReqUri^/oam/server/auth_cred_submit ReqFilename^/app/Middleware/Oracle_WT1/instances/instance2/config/OHS/ohs1/htdocs/oam ReqPath^/server/auth_cred_submit ReqArgs^
ohs.log contains the following
[2016-05-15T10:37:23.6341-07:00] [OHS] [ERROR:32] [OHS-9999] [core.c] [client_id: 192.168.56.101] [host_id: identity.oracleads.com] [host_addr: 192.168.56.101] [tid: 1083734336] [user: oracle] [ecid: 005CiJpvzd1Fw00Fzzx0g00001BQ000005] [rid: 0] [VirtualHost: main] Unable to process the request due to unexpected error., referer: http://identity.oracleads.com:7778/oamsso-bin/login.pl?type=PSWDMUSTCHANGE&ruleDesc=PSWD-21%7E%7EPSWD-1%3A%3A1%7E%7EPSWD-6%3A%3A1%7E%7EPSWD-18%7E%7EPSWD-19%7E%7E&mayChange=false&alreadyChallenged=false
and finally oam-diagnostic contains
[2016-05-15T10:37:07.976-07:00] [oam_server] [NOTIFICATION] [] [oracle.oam.pswd.service.provider] [tid: [ACTIVE].ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)'] [userId: <anonymous>] [ecid: 024170c1c59452c4:-4efa23da:154b5715355:-8000-0000000000000546,0] [APP: oam_server#11.1.2.0.0] User pswd plugin status result: User: JKRAUSE, idstore OUDStore1, outcome : PAUSE
Can't figure out what to check else. Any ideas are appreciated.
TIA,
Philipp