2715849 - 500 Internal Server Error is returned when opening "TrustedCAs" keystore view in NWA - KeyStoreException: Unable to recover a certificate chain

After trying to renew a new certificate in TrustedCAs, 500 Internal Server Error is returned when opening "TrustedCAs" keystore view in NWA of AS Java. 

500 Internal Server Error SAP NetWeaver Application Server/Java AS

Failed to process request. Please contact your system administrator.

In related defaultTrace file the following can be found:

Error#com.sap.engine.services.servlets_jsp.ISE500#
com.sap.ASJ.web.000500###C0000A40988501500000000100001FC4#295476552000000004#sap.com/tc~lm~itsam~ui~mainframe~wd#com.sap.engine.services.servlets_jsp.ISE500#Administrator
#3##FF00B0A6B94011E8CF460000119C9D48#3557f503b94111e892500000119c9d48##0#Thread[HTTP Worker [@352401987],5,Dedicated_Application_Thread]#Plain##

500 Internal Server Error is returned for HTTP request [http://<hostname>:5XX00/webdynpro/resources/sap.com/tc~lm~itsam~ui~mainframe~wd/FloorPlanApp]:
component [dispatcher],
web module [webdynpro/resources/sap.com/tc~lm~itsam~ui~mainframe~wd],
application [sap.com/tc~lm~itsam~ui~mainframe~wd],
DC name [],
CSN component[],
problem categorization [],
internal categorization [500537821].

[EXCEPTION]
java.lang.NullPointerException: while trying to invoke the method com.sap.engine.services.keystore.jmx.data._gen.ExtendedEntryInfo.getEntryType() of a null object loaded from local variable 'entryInfo'
at com.sap.security.wd.keystore.KeystoreComponent.supplyKeystoreEntries(KeystoreComponent.java:1171)
[...]

and

#2.0#2018 09 16 03:06:01:903#+0200#Error#com.sap.engine.services.keystore#
com.sap.ASJ.key.sv0079#BC-JAS-SEC#keystore#C0000A409885057D0000000000002B94#295476550000000004#sap.com/tc~lm~itsam~ui~mainframe~wd#com.sap.engine.services.keystore#
Administrator#24##9B87E2A9B94B11E8AC360000119C9D46#2098947ab94c11e883f70000119c9d46##0#Thread[HTTP Worker [@733725909],5,Dedicated_Application_Thread]#Plain##
Can not get extended entry info for entry <private key name>
[EXCEPTION]
java.security.KeyStoreException: Unable to recover a certificate chain:
java.lang.ClassCastException: Cannot cast class iaik.asn1.UNKNOWN to class iaik.asn1.SEQUENCE
at com.sap.engine.services.keystore.impl.KeyStoreEntry.getCertificateChain(KeyStoreEntry.java:297)
at com.sap.engine.services.keystore.impl.util.EntryUtility.getStringRepresentation(EntryUtility.java:236)
at com.sap.engine.services.keystore.impl.util.EntryUtility.getExtendedEntryInfo(EntryUtility.java:186)
at com.sap.engine.services.keystore.jmx.bean.ViewManager.getExtendedEntryInfo(ViewManager.java:165)
at sun.reflect.GeneratedMethodAccessor464.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71)
at sun.reflect.GeneratedMethodAccessor54.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl

…

at com.sap.security.wd.keystore.wdp.InternalKeystoreConfiguration.getExtendedEntryInfo(InternalKeystoreConfiguration.java:152)
at com.sap.security.wd.keystore.KeystoreComponent.supplyKeystoreEntries(KeystoreComponent.java:1170)
at com.sap.security.wd.keystore.wdp.InternalKeystoreComponent.supplyKeystoreEntries(InternalKeystoreComponent.java:445)
at com.sap.security.wd.keystore.wdp.IPublicKeystoreComponent$IKeystoreEntriesNode.doSupplyElements(IPublicKeystoreComponent.java:1111)
at com.sap.tc.webdynpro.progmodel.context.DataNode.supplyElements(DataNode.java:110)

...

SAP NetWeaever AS Java NWA

500 Internal Server Error, Trusted CAs, keystore view, KeyStoreException, Unable to recover a certificate chain, DELETE TrustedCAs , add keystore, Certificates and Keys, ClassCastException, supplyKeystoreEntries, keystore.jmx.data._gen.ExtendedEntryInfo.getEntryType() , KBA , BC-JAS-SEC , Security, User Management , Problem