Log file displaying as a string message

I am using filebeat to ingest a log file so I can view it on Kibana but on Kibana the log file comes up as this:

`"#fields\tts\tid\tcertificate.version\tcertificate.serial\tcertificate.subject\tcertificate.issuer\tcertificate.not_valid_before\tcertificate.not_valid_after\tcertificate.key_alg\tcertificate.sig_alg\tcertificate.key_type\tcertificate.key_length\tcertificate.exponent\tcertificate.curve\tsan.dns\tsan.uri\tsan.email\t@kibana-highlighted-field@san.ip@/kibana-highlighted-field@\tbasic_constraints.ca\tbasic_constraints.path_len"`

How can I parse this?

Thanks.

can you check filebeat debug logs and see if this is what is actually emitted?
you can do this by running filebeat with -d or specifying logging.level to debug in a config

also your configuration file would help as well