Failed to allocate remote memory Windows 2019 17763

[MikosMotta]

Hi,
I saw your project the other day and I decided to give it a try against a Windows Server 2019 (Build 17763) that I have set up.
Every time I ran the exploit I got a [-] Failed to allocate remote memory[-] Failed to write to remote memory error and I was wondering was is it that makes it not work.

The problem arises here:
LPVOID buffer = VirtualAllocEx(proc, NULL, sizeof(payload), MEM_RESERVE | MEM_COMMIT, PAGE_EXECUTE_READWRITE);

because the buffer is left blank therefore I get the error each time, but what could cause the allocation to fail?

I'm trying to debug the problem, but I don't seem to be able to reach its solution.

Any hints?
Thanks so much.