LowLevelFatalError when trying to join Friend's nitrado server.

I am aware that people asked because of LowLevelFatalErrors before on here, but i haven't seen one for mine, which is Line 517. It happens when i join it through the steam serverbrowser. The game lags for a second, then the following error appears:

LowLevelFatalError [File:D:\ASE\Engine\Source\Runtime\Engine\Private\NetConnection.cpp] [Line: 517]

UNetConnection::ValidateSendBuffer: Out.IsError() == true. NumBits: 4046, NumBytes: 506, MaxBits: 4096

VERSION: 360.11

KERNELBASE.dll!UnknownFunction (0x00007fffe7055339) + 0 bytes [UnknownFile:0]

ShooterGame.exe!FError::LowLevelFatal() (0x00007ff775fbcfb5) + 0 bytes [d:\ase\engine\source\runtime\core\private\misc\outputdevice.cpp:354]

ShooterGame.exe!UNetConnection::ValidateSendBuffer() (0x00007ff77690f095) + 0 bytes [d:\ase\engine\source\runtime\engine\private\netconnection.cpp:519]

ShooterGame.exe!UNetConnection::WriteBitsToSendBuffer() (0x00007ff77691132a) + 0 bytes [d:\ase\engine\source\runtime\engine\private\netconnection.cpp:1400]

ShooterGame.exe!UNetConnection::SendRawBunch() (0x00007ff776911a09) + 52 bytes [d:\ase\engine\source\runtime\engine\private\netconnection.cpp:1529]

ShooterGame.exe!UControlChannel::Tick() (0x00007ff7767aa95f) + 0 bytes [d:\ase\engine\source\runtime\engine\private\datachannel.cpp:1232]

ShooterGame.exe!UNetConnection::Tick() (0x00007ff77691217b) + 0 bytes [d:\ase\engine\source\runtime\engine\private\netconnection.cpp:1783]

ShooterGame.exe!UNetDriver::TickFlush() (0x00007ff7769147f8) + 0 bytes [d:\ase\engine\source\runtime\engine\private\networkdriver.cpp:353]

ShooterGame.exe!USteamNetDriver::TickFlush() (0x00007ff777805d3e) + 0 bytes [d:\ase\engine\source\runtime\online\onlinesubsystemsteam\private\steamnetdriver.cpp:199]

ShooterGame.exe!UPendingNetGame::Tick() (0x00007ff77694989f) + 0 bytes [d:\ase\engine\source\runtime\engine\private\pendingnetgame.cpp:554]

ShooterGame.exe!UEngine::TickWorldTravel() (0x00007ff776ace9fa) + 0 bytes [d:\ase\engine\source\runtime\engine\private\unrealengine.cpp:9220]

ShooterGame.exe!UGameEngine::Tick() (0x00007ff77680ef7a) + 0 bytes [d:\ase\engine\source\runtime\engine\private\gameengine.cpp:1168]

ShooterGame.exe!FEngineLoop::Tick() (0x00007ff773e5c989) + 0 bytes [d:\ase\engine\source\runtime\launch\private\launchengineloop.cpp:2647]

ShooterGame.exe!GuardedMain() (0x00007ff773e5719c) + 0 bytes [d:\ase\engine\source\runtime\launch\private\launch.cpp:140]

ShooterGame.exe!GuardedMainWrapper() (0x00007ff773e5deba) + 5 bytes [d:\ase\engine\source\runtime\launch\private\windows\launchwindows.cpp:125]

ShooterGame.exe!WinMain() (0x00007ff773e5e009) + 8 bytes [d:\ase\engine\source\runtime\launch\private\windows\launchwindows.cpp:213]

ShooterGame.exe!__tmainCRTStartup() (0x00007ff777c10d21) + 21 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]

KERNEL32.DLL!UnknownFunction (0x00007fffe8fe7374) + 0 bytes [UnknownFile:0]

ntdll.dll!UnknownFunction (0x00007fffe95dcc91) + 0 bytes [UnknownFile:0]

ntdll.dll!UnknownFunction (0x00007fffe95dcc91) + 0 bytes [UnknownFile:0]

Anyone ever had this issue?