Error after upgrading filebeat to 7.10

Elastic Stack Beats
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12

commenting the below section out in the ingest/pipeline.yml gets me passed the errors and filebeat starts properly finally

    #- split:
    #    field: cisco.umbrella.identities
    #    separator: ","
    #    preserve_trailing: false
    #    if: "ctx?.log?.file?.path.contains('dnslogs') && ctx?.cisco?.umbrella?.identities != null"