Avamar: AUI fails to list clients due to a field mapping error

The following error message appears when listing clients of a specific domain in Asset Management.

org.apache.commons.beanutils.ConversionException: Error converting from 'String' to 'Integer' For input string: "null" Error converting from 'String' to 'Integer' For input string: "null" Internal exception.: please check console log.

A field mapping error is reported in the mc-rest-api.log:

2023-11-11 00:57:26.740  INFO 8870 --- [http-nio-9000-exec-8] com.avamar.mc.api.core.trace.LogFilter   : aui_client_id *****@**.***.com [req] 13436404021623100 GET /api/v1/groups domain=/domain-name&recursive=false&filter=type==REGULAR&size=1  [res] status 200 in 3 ms
2023-11-11 00:57:26.954  INFO 8870 --- [http-nio-9000-exec-2] com.avamar.mc.api.core.trace.LogFilter   : aui_client_id *****@**.***.com [req] 13436404235621082 GET /api/v1/activities/status domain=/domain-name&recursive=false  [res] status 200 in 221 ms
2023-11-11 00:57:29.544 ERROR 8870 --- [http-nio-9000-exec-6] org.dozer.MappingProcessor               : Field mapping error -->
  MapId: null
  Type: null
  Source parent class: com.avamar.mc.cr.ClientDescriptor
  Source field name: pagePort
  Source field type: class java.lang.String
  Source field value: null
  Dest parent class: com.avamar.mc.api.client.domain.Client
  Dest field name: paging.securePort
  Dest field type: java.lang.Integer
org.dozer.converters.ConversionException: org.apache.commons.beanutils.ConversionException: Error converting from 'String' to 'Integer' For input string: "null"
        at org.dozer.converters.PrimitiveOrWrapperConverter.convert(PrimitiveOrWrapperConverter.java:70)
        at org.dozer.MappingProcessor.mapOrRecurseObject(MappingProcessor.java:449)
        at org.dozer.MappingProcessor.mapFromFieldMap(MappingProcessor.java:361)
        at org.dozer.MappingProcessor.mapField(MappingProcessor.java:307)
        at org.dozer.MappingProcessor.map(MappingProcessor.java:267)
        at org.dozer.MappingProcessor.mapToDestObject(MappingProcessor.java:216)
        at org.dozer.MappingProcessor.createByCreationDirectiveAndMap(MappingProcessor.java:196)
        at org.dozer.MappingProcessor.mapGeneral(MappingProcessor.java:170)
        at org.dozer.MappingProcessor.map(MappingProcessor.java:104)
        at org.dozer.MappingProcessor.map(MappingProcessor.java:99)
        at org.dozer.DozerBeanMapper.map(DozerBeanMapper.java:120)
        at com.avamar.mc.api.core.dozer.PojoManager$KylinDozerBeanMapper.map(PojoManager.java:41)
        at com.avamar.mc.api.client.service.ClientServiceImpl.convertClient(ClientServiceImpl.java:310)
        at com.avamar.mc.api.client.service.ClientServiceImpl.convertClients(ClientServiceImpl.java:287)
        at com.avamar.mc.api.client.service.ClientServiceImpl.getClients(ClientServiceImpl.java:155)
        at com.avamar.mc.api.client.service.ClientServiceImpl$$FastClassBySpringCGLIB$$98d1fa0b.invoke(<generated>)
        at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:218)

There is no related error reported in mcserver.log. The UI can also list the domain clients. 

The error message complains about the null of page port for certain clients under this domain.

2023-11-11 00:57:29.544 ERROR 8870 — [http-nio-9000-exec-6] org.dozer.MappingProcessor               : Field mapping error -->
  MapId: null  Type: null  Source parent class: com.avamar.mc.cr.ClientDescriptor
  Source field name: pagePort
  Source field type: class java.lang.String  Source field value: null  Dest parent class: com.avamar.mc.api.client.domain.Client
  Dest field name: paging.securePort
  Dest field type: java.lang.Integerorg.dozer.converters.ConversionException: org.apache.commons.beanutils.ConversionException: Error converting from 'String' to 'Integer' For input string: "null"

Contact Dell Support for assistance with this issue and reference this knowledge article.