1552396 - Unable to open Integration Process in ESR

When opening an Integration Process object in the Enterprise Services Repository (ESR), you get the error:
Error When Executing Open
Runtime error (RuntimeException). See details

The stack trace contains the following:

Serialized cause: com.sap.aii.utilxi.hmi.api.HmiCoreException: Unexpected error on server for system REPOSITORY with application REPOSITORY.
Detailed information: while trying to invoke the method com.sap.aii.ibrep.bom.ctxass.ContextObjectAssignable.getContextObjectMap() of an object loaded from local variable 'obj'.
Server stack trace:
java.lang.NullPointerException: while trying to invoke the method com.sap.aii.ibrep.bom.ctxass.ContextObjectAssignable.getContextObjectMap() of an object loaded from local variable 'obj'
at com.sap.aii.ibrep.server.ifr.RepServerInternalCtxInformationService.getContextObjectInformation(RepServerInternalCtxInformationServiceProvider.java:47)
at com.sap.aii.ib.bom.ifr.CtxInformationServiceImpl.getContextObjectInformation....

• SAP NetWeaver Process Integration 7.1
• SAP enhancement package 1 for SAP NetWeaver Process Integration 7.1

Process Integration 7.10, PI 7.10, Process Integration 7.11, PI 7.11, com.sap.aii.ib.core.oa.ObjectAccessException, transport, CTS+, CMS, Integration Builder, Directory, export, Business Process, BPM , KBA , BC-XI-IBD-BPM , Business Process Modeler , BC-XI-IBC , Integration Builder - Configuration , BC-XI-IBF , Framework , Problem