KeyError: 'data_file_directories'

[AntonAntonyuk]

hi, when trying backup ,get error :
[10.130.102.129] Executing task 'upload_node_backups'
[10.130.102.129] run: cassandra-snapshotter-agent create-upload-manifest --manifest_path=/tmp/backupmanifest --snapshot_name=20191018162550 --snapshot_keyspaces=test --snapshot_table=recommendations --conf_path=/opt/cassandra/conf --exclude_tables=
Connected (version 2.0, client OpenSSH_7.2p2)
Authentication (publickey) successful!
[10.130.102.129] out: Traceback (most recent call last):
[10.130.102.129] out: File "/home/testbackup/.local/bin/cassandra-snapshotter-agent", line 9, in
[10.130.102.129] out: load_entry_point('cassandra-snapshotter==1.2.0', 'console_scripts', 'cassandra-snapshotter-agent')()
[10.130.102.129] out: File "/home/testbackup/.local/lib/python2.7/site-packages/cassandra_snapshotter/agent.py", line 306, in main
[10.130.102.129] out: args.incremental_backups
[10.130.102.129] out: File "/home/testbackup/.local/lib/python2.7/site-packages/cassandra_snapshotter/agent.py", line 202, in create_upload_manifest
[10.130.102.129] out: data_paths = get_data_path(conf_path)
[10.130.102.129] out: File "/home/testbackup/.local/lib/python2.7/site-packages/cassandra_snapshotter/agent.py", line 185, in get_data_path
[10.130.102.129] out: data_paths = cassandra_configs['data_file_directories']
[10.130.102.129] out: KeyError: 'data_file_directories'
[10.130.102.129] out:

Fatal error: run() received nonzero return code 1 while executing!

Requested: cassandra-snapshotter-agent create-upload-manifest --manifest_path=/tmp/backupmanifest --snapshot_name=20191018162550 --snapshot_keyspaces=test --snapshot_table=recommendations --conf_path=/opt/cassandra/conf --exclude_tables=
Executed: /bin/bash -l -c "cassandra-snapshotter-agent create-upload-manifest --manifest_path=/tmp/backupmanifest --snapshot_name=20191018162550 --snapshot_keyspaces=test --snapshot_table=recommendations --conf_path=/opt/cassandra/conf --exclude_tables="

Aborting.

Fatal error: One or more hosts failed while executing task 'upload_node_backups'

in cassandra.yaml , data_file_directories: not specified
i believe it because of this. is the way to specify it as parameter ? or maybe i do something wrong. any ideas?