Sophos xg 330 web console blank white screen

We restart the GUI services with ssh. it work now

Hi Remi Bergeron Please check the suggested steps in below thread and confirm the status:

community.sophos.com/.../blank-white-screen-firewall-login-page

with this command Service tomcat:restart -ds nosync

Hi Remi Bergeron  Thanks for sharing the update as it is fixed with the help of Tomcat restart, can you please share the below output from your XG shell prompt for my reference?

#cat /log/tomcat.log | grep -i "maximum number" | wc -l

Hi Remi Bergeron If the above command output is giving a count of more than 0 then it indicates it is impacted by the issue 

The above is already fixed in V19.5.4 MR-4 and an upgrade to the same will fix the issue and V19.5.4 is already released.