Here is the crash report, Im very thankful for the help I can get.

crash-2023-11-25_21.38.59-server.txt

Someone who can help me solve this?

Its a client Im playing on, I increased the alloctated RAM but it still crashes.
crash-2023-11-28_20.05.26-server.txt

I tried to decrease the allocated RAM and this shows up:
The game crashed whilst ticking block entity
Error: java.lang.NullPointerException: Cannot invoke "net.minecraftforge.fluids.capability.IFluidHandler.getTanks()" because "this.handler" is null Exit code: -1
Crash report:
crash-2023-11-28_20.14.49-server.txt

I would be very happy if someone could help me. :-)

Not sure what's causing that crash, but I did notice you're leaving 1gb of memory for Windows, without java overshooting, as it tends to do. If this is a server, you can probably back that down to 4gb and see if it fixes it. If it's a client, you'll want more system ram total for this pack.