A wild guess would be that the Patcher isn't patching everything correctly because "followerZryachiy" is from the latest update as far as I am concerned?
Console last message shows "Client/Locations"
Error log:
Error|backend|<--- Response HTTPS, id [80]: Exception occured: 0, GException5: In response to http://127.0.0.1:6969/client/locations: Error converting value "followerZryachiy" to type 'EFT.WildSpawnType'. Path '59fc81d786f774390775787e.BossLocationSpawn[2].Supports[0].BossEscortType', line 1, position 169180. ---> Newtonsoft.Json.JsonSerializationException: Error converting value "followerZryachiy" to type 'EFT.WildSpawnType'. Path '59fc81d786f774390775787e.BossLocationSpawn[2].Supports[0].BossEscortType', line 1, position 169180. ---> System.ArgumentException: Requested value 'followerZryachiy' was not found.
at Newtonsoft.Json.Utilities.EnumUtils.ParseEnum (System.Type enumType, Newtonsoft.Json.Serialization.NamingStrategy namingStrategy, System.String value, System.Boolean disallowNumber) [0x001f9] in <a188f91889dd430ea0449cfb94e0c4ca>:0
at Newtonsoft.Json.Converters.StringEnumConverter.ReadJson (Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Object existingValue, Newtonsoft.Json.JsonSerializer serializer) [0x0007b] in <a188f91889dd430ea0449cfb94e0c4ca>:0
--- End of inner exception stack trace ---