Unable to log in to portal after system copy

Good day

I have copied my production portal system to a test system. I am using an ECC Abap system as my user store. The portal start successfully and I am able to access the Visual administrator.

I am however unable to log on to the portal. The error I get is "User authentication error".

Below is an extract from the security log:

#1.5#0011259C05FB0054000002F500001B9800043F56F6157AED#1195542635224#/System/Security/Authentication#sap.com/irj#com.sap.engine.services.security.authentication.logincontext#Guest#0##sapsep.sap.lonmin_SEP_32623050#Guest#af93b280973711dc980a0011259c05fb#SAPEngine_Application_Thread[impl:3]_35##0#0#Error#1#com.sap.engine.services.security.authentication.logincontext#Plain###LOGIN.FAILED

User: N/A

Authentication Stack: ticket

Login Module Flag Initialize Login Commit Abort Details

com.sap.security.core.server.jaas.EvaluateTicketLoginModule SUFFICIENT ok false false true

com.sap.security.core.server.jaas.CreateTicketLoginModule SUFFICIENT ok false false true

com.sap.engine.services.security.server.jaas.BasicPasswordLoginModule REQUISITE ok true true true

com.sap.security.core.server.jaas.CreateTicketLoginModule REQUISITE ok true exception true null#

#1.5#0011259C05FB0054000002F700001B9800043F56F61580BC#1195542635240#/System/Security/Audit#sap.com/irj#com.sap.security.core.util.SecurityAudit#Guest#0##sapsep.sap.lonmin_SEP_32623050#Guest#af93b280973711dc980a0011259c05fb#SAPEngine_Application_Thread[impl:3]_35##0#0#Warning#1#com.sap.security.core.util.SecurityAudit#Plain###Guest | LOGIN.ERROR | null | | Login Method=[default], UserID=[oostw], IP Address=[172.27.2.137], Reason=[Access Denied.]#

Please can someone assist.

Thanks

Wilhelm