widget error

Hello, I am trying to understand how the Nostale widget works. I'm pretty sure I did everything right. But it keeps giving me an error that my game is not running even though it's open. As in the screenshots below I put the corresponding directories and I modified my client to 3175 with hacker resource but it does not want to compile it I do not understand... Do I have to have the real client 3175 without it being modified by a program?

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It's not how to fix your error but some offsets are outdated so anyway you won't be able to run it on newer version

Where can I find an older client?

Official Update API lel you can download it directly from gameforge any version you wanna

I searched and I can't find where or how