CFPDF readsignaturefields

I am trying to get the signature field from a pdf and this message pops up:

PDF Digital Signatures is not available in this edition of ColdFusion server.

Running CF Standard 2018 update 10 with jdk-11.0.9.

<cfpdf action="readsignaturefields" source="#expandPath('./pdfsig_test_signed.pdf')#" name="signinfo" />
<cfdump var="#signinfo#" label="signinfo"/>