SSO SAML using ADFS

I've tried for the past few days using every article and resource I can to get Splunk to work with SSO, but am ending up short. We currently have an instance installed on a windows server that works fine with ADFS. I took over this position and they wanted a separate instance installed on a Linux box and to use ADFS as well. I'm using version 7.3.1 and the current errors in my splunkd.log file are errors in the XMLParser and SAML involving the func=xmlSecOpenSSLAppKeyLoadBIO and failed to load private pem key.