LSF 9.01 and DSSO 10

Hi Lawson Gurus,

We currently have a Lawson backend server with LSF and Lawson apps on version 9.01.
We have a separate SharePoint server with Workspace already installed. Workspace is not yet connected/integrated with the Lawson server.

The S3 Workspace plugin installer requires DSP to be installed on the Workspace server.
Using the DSP 10 installation files, we attempted to install DSSO and pointed it to the Lawson backend server as the "Lawson Security server".
The DSSO installation fails, and an extract of the error is below.

Question: Is it even possible to install the DSP/DSSO version 10 component connected to a Lawson 9.01 backend?

-----------------------------------------------------------------
com.lawson.security.authen.SecurityAuthenException: Failed to initialize authentication layer. Cause Connection error (lawsondevserver.domain, null). Cause: {2}.
Fatal: [install-dsso.pl] Could not stream RMApiInit.properties from server: com.lawson.security.authen.SecurityAuthenException: Failed to initialize authentication layer. Cause Connection error (lawsondevserver.domain, null). Cause: {2}.

com.lawson.security.authen.SecurityAuthenException: com.lawson.security.authen.AuthenMessages.Required attribute MSGTYPE is missing from message (Error: no separator).
-----------------------------------------------------------------