REST API Modular Input invalid header

All Apps and Add-ons

I am trying to use the REST API Modular Input app, but I am getting this error:

ERROR ExecProcessor - message from "python /opt/splunk/etc/apps/rest_ta/bin/rest.py" Exception performing request: Invalid header name 'X-APIKeys: accessKey'

X-APIKeys: accessKey=blah;secretKey=blah

Ideas on how to fix?

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