Importing Sigma Rule results into Error Message

Plugins Security Analytics
1

Versions (relevant - OpenSearch/Dashboard/Server OS/Browser):
Opensearch 2.4.0
Opensearch Dashboards 2.4.0
Ubuntu 20.04 LTS

Describe the issue:
Importing a YAML Sigma Rule File results into an Error Message. What am I doing wrong?

Relevant Logs or Screenshots:

2

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