Odd thought...
Does your new system have ALL of the same *.DLLs, and are they all in the same places? I mean, I know you copied the Ryzom directories, but if there is anything outside of those directories (maybe OpenGL/DirectX stuff) that the client calls on, the filepaths may not match up. What happens when it can't find what it's looking for? Usually an error.
Over the decades I've been computing, I've found that when dealing with Windows, blaming DLLs is often a good default position with filepaths a strong second guess.
Does your new system have ALL of the same *.DLLs, and are they all in the same places? I mean, I know you copied the Ryzom directories, but if there is anything outside of those directories (maybe OpenGL/DirectX stuff) that the client calls on, the filepaths may not match up. What happens when it can't find what it's looking for? Usually an error.
Over the decades I've been computing, I've found that when dealing with Windows, blaming DLLs is often a good default position with filepaths a strong second guess.
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Do not assume that you speak for all just because you are the loudest voice; there are many who disagree that simply have no desire to waste words on you.