Valheim dedicated liknux server, disconnect when users try to connect

Hi

I just can't get this to work. In the logs it look like this when a player try to connect:

:14:01 ubuntu-valheim start_valheim.sh[695]: (Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
Feb 16 16:15:21 ubuntu-valheim start_valheim.sh[695]: Warning: failed to init SDL thread priority manager: SDL not found
Feb 16 16:15:21 ubuntu-valheim start_valheim.sh[695]: 02/16/2021 16:15:21: Got session request from 76561198072155869
Feb 16 16:15:21 ubuntu-valheim start_valheim.sh[695]:
Feb 16 16:15:21 ubuntu-valheim start_valheim.sh[695]: (Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: STEAMPS3 - AsyncTCPSocket created
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: STEAMPS3 - AsyncTCPSocket created
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: STEAMPS3 - AsyncTCPSocket created
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: STEAMPS3 - AsyncTCPSocket created
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: STEAMPS3 - AsyncTCPSocket created
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: STEAMPS3 - AsyncTCPSocket created
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: 02/16/2021 16:15:36: Got connection failed callback: 76561198072155869
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]:
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: (Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: 02/16/2021 16:15:36: Closing socket 76561198072155869
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]:
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: (Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: 02/16/2021 16:15:36:   send queue size:0
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]:
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: (Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: 02/16/2021 16:15:36:   P2P state, bytes in send queue:0
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]:
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: (Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: STEAMPS3 - AsncTCPSocket destroyed
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: STEAMPS3 - AsncTCPSocket destroyed
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: STEAMPS3 - AsncTCPSocket destroyed
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: STEAMPS3 - AsncTCPSocket destroyed
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: STEAMPS3 - AsncTCPSocket destroyed
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: STEAMPS3 - AsncTCPSocket destroyed
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: 02/16/2021 16:15:36: Disposing socket
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]:
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: (Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: 02/16/2021 16:15:36: Closing socket 0
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]:
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: (Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: 02/16/2021 16:15:36: Disposing socket
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]:
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: (Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: 02/16/2021 16:15:36: Closing socket 0
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]:
Feb 16 16:15:36 ubuntu-valheim start_valheim.sh[695]: (Filename: ./Runtime/Export/Debug/Debug.bindings.h Line: 35)

Looked at every tutorial and post about this I can find, but still can't get it to connect.

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EDIT: many people use linux, I prefer liknux.. That's a joke, should have read the title twice before posting.