GW 2014 R2 SP3 cannot upload images from GWadmin

Hello Forum members,

I've upgraded one server to GW 2014 R2 SP3 build 129832 yesterday, now I cannot upload images for users.

Log in to GW admin console.
Open your favorite user object
Click on the image of the user and browse to an image. Click OK.
The name of the image file is displayed next to the Browse button in the "Edit User Image" window.
Click OK.
An error message is displayed : "*The image could not be added to the user."

This worked in GW 2014 R2 SP2 HP1 build 126868

Does anybody has a similar error?