SOAP error when saving file with 11.0 SP2

Hi,

We had no problem with 11.0 but we have this message when saving file with 11.0 SP2 :

Server returned invalid SOAP message.<parsererror xmlns="http://www.mozilla.org/newlayout/xml/parsererror.xml">Erreur d'analyse XML : mal formé
Emplacement : https://myserver/11_0_sp2/Client/X-salt=std_11.0.0.6152-X/scripts/Innovator.aspx
Numéro de ligne 1, Colonne 50 :<sourcetext>&lt;!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN""http://www.w3.org/TR/html4/strict.dtd"&gt;
-------------------------------------------------^</sourcetext></parsererror>

Has anyone an issue ?

Thanks in advance.