Rodolfo,
Sorry for the troubles. We updated the JomSocial profile plugin recently to support the multi-profiles feature of JomSocial 2.0+. In the process, it caused a problem with older versions of JomSocial.
To fix, please make the modification noted in the forum post below:
www.sourcecoast.com/forums/jfbconnect/jf...ses-error?p=1#p13642
If you run into any other issues with this change, or anything else, just let us know!
Alex