i need help

[GreaseGoblin]

I'm trying to set up a LAN server using the dedicated server tool but i get booted saying lost conection to steam or host and this pops up in the actual server a ♥♥♥♥♥♥♥ a second

src\steamnetworkingsockets\clientlib\steamnetworkingsockets_connections.cpp (2463) : Assertion Failed: [#3316894769 UDP steamid:76561199023663284@192.168.1.11:50324] problem (4003) %s, but connection already dead (0 4003 Cert is not authorized for appid 1110390, only 304930)

[GreaseGoblin]

I also forgot to say this poped up before that in red (no i do not have a mod called Paker's)
Failed to generate an item with ID 0 from type Paker's [37]
Failed to generate an item with ID 0 from type Paker's [37]
Failed to generate an item with ID 0 from type Paker's [37]
Failed to generate an item with ID 0 from type Paker's [37]
Failed to generate an item with ID 0 from type Paker's [37]
Failed to generate an item with ID 0 from type Paker's [37]
Failed to generate an item with ID 0 from type Paker's [37]
Failed to generate an item with ID 0 from type Paker's [37]
Failed to generate an item with ID 0 from type Paker's [37]
Failed to generate an item with ID 0 from type Paker's [37]
Failed to generate an item with ID 0 from type Paker's [37]
Failed to generate an item with ID 0 from type Paker's [37]
Failed to generate an item with ID 0 from type Paker's [37]
Failed to generate an item with ID 0 from type Paker's [37]
Failed to generate an item with ID 0 from type Paker's [37]
Failed to generate an item with ID 0 from type Paker's [37]
Failed to generate an item with ID 0 from type Paker's [37]