Fluentd generates empty folders

Question

I'm trying to pass an apache_error log to fluentd so it can be transformed into a JSON file. But it only generates file.json as an empty folder and not as a JSON file.

Here is my fluentd.conf:

<source>
  @type tail
  path E:\Kaggle-datasets\appache-log\apache_error
  pos_file E:\Kaggle-datasets\appache-log\Apache_2k.log.pos
  format apache_error
  tag apache.error
</source>

<filter apache.error>
  @type parser
  key_name message
  reserve_data true
  <parse>
    @type apache_error
  </parse>
</filter>

<match apache.error>
  @type file
  path E:\Kaggle-datasets\appache-log\file.json
  <buffer>
    flush_mode interval
    flush_interval 10s
  </buffer>
</match>