In Splunk Add-on for Salesforce 2.0.0 (https://splunkbase.splunk.com/app/3549/), there are predefined data inputs with the unmapped account name. Here You have to add ACCOUNT details from the configuration tab. After adding Account details you have to edit data input and select Account & then update data input. Initially, all the data inputs are disabled so you have to enable data inputs.
Can you please do it and check it again?