When some users attempt to login via SSO, they receive the following error:

 

Web Services "[URL_TO_GSOAP sbminternalservices72]" returned an error: "java.lang.illegalArumentException".

 

The SSO-IDP.log shows the same error.

 

This may be an issue with the way users were imported / created in SBM.  Perhaps, this is caused by an upgrade from an old version of TeamTrack.  Check the TS_TIMEPREFERENCES column in the TS_USERS table in the Application Engine database for the user.  The only valid values for TS_TIMEPREFERENCES are 0 or 1.  If you have any other value in TS_TIMEPREFERENCES, replace it with a 0 or 1.