I re installed everything from scratch. Game, mod, and Bepin.
Unrestricted portal is the only mod installed.
Bepin Loader gives the following error message.

[Info : BepInEx] Loading [UnrestrictedPortals 1.4.2]
[Message:UnrestrictedPortals] Loading configuration...
[Error : Unity Log] TypeLoadException: Could not load type of field 'UnrestrictedPortals.Configuration.Yaml:Deserializer' (0) due to: Could not load file or assembly 'YamlDotNet, Version=11.0.0.0, Culture=neutral, PublicKeyToken=ec19458f3c15af5e' or one of its dependencies. assembly:YamlDotNet, Version=11.0.0.0, Culture=neutral, PublicKeyToken=ec19458f3c15af5e type:<unknown type> member:(null) signature:<none>
Stack trace:
UnrestrictedPortals.Plugin.LoadConfiguration () (at <64b8e81d5069482a8dd8a5b20ff015f8>:0)
UnrestrictedPortals.Plugin.Awake () (at <64b8e81d5069482a8dd8a5b20ff015f8>:0)
UnityEngine.GameObject:AddComponent(Type)
BepInEx.Bootstrap.Chainloader:Start()
UnityEngine.Application:.cctor()

Anyone know what that means?