ITS custom Theme not working after upgrade EHP7

Hi.

We have service ITS published in the portal 7.4.

We have updated the system SAP ERP ehp6 to ehp7 , however the applications not work fine.

What is the cause of this issue?

We use this parameters

~TRANSACTION    zTEST

~GENERATEDYNPRO    1

~WEBGUI    1

~COOKIES    0

~NOHEADEROKCODE    1

~THEME    sl

~WEBGUI_THEME    sl

~NO_ITS_HEADER    1

~WEBGUI_SIMPLE_TOOLBAR    34

~WDSKIPSPLASHSCREEN    1

Regards