In addition to my previous post :

I tried a "texture only" rip, and in the folder were only 2 textures (Tex_0000.dds and Tex_0405.dds).
The game crashed after only a few seconds.
I attached the log file to this post.

Before the last update, for me NinjaRipper wasn't doing anything when pressing the keybind in Revelation Online (whereas it was working fine in other games). Now the capture is triggered successfully. However , the game crashes before the end of the ripping process, and many textures are missing ! (...