Crashes on start up on Linux: System.MissingMethodException`: bool string.Contains(char)

[fusion809]

Hi,

On my Tumbleweed system I get the following crash on start up:

Platform is Linux
Engine version is release-20180923
Exception of type `System.MissingMethodException`: bool string.Contains(char)
  at OpenRA.FieldLoader.TryGetValueFromYaml (System.String yamlName, System.Reflection.FieldInfo field, System.Collections.Generic.Dictionary`2[TKey,TValue] md, System.Object& ret) [0x00026] in <cf39686ec6964e2795c81c2e7daf1fea>:0 
  at OpenRA.FieldLoader.Load (System.Object self, OpenRA.MiniYaml my) [0x00093] in <cf39686ec6964e2795c81c2e7daf1fea>:0 
  at OpenRA.Settings.LoadSectionYaml (OpenRA.MiniYaml yaml, System.Object section) [0x00029] in <cf39686ec6964e2795c81c2e7daf1fea>:0 
  at OpenRA.Settings..ctor (System.String file, OpenRA.Arguments args) [0x0016a] in <cf39686ec6964e2795c81c2e7daf1fea>:0 
  at OpenRA.Game.InitializeSettings (OpenRA.Arguments args) [0x00015] in <cf39686ec6964e2795c81c2e7daf1fea>:0 
  at OpenRA.Game.Initialize (OpenRA.Arguments args) [0x000cc] in <cf39686ec6964e2795c81c2e7daf1fea>:0 
  at OpenRA.Game.InitializeAndRun (System.String[] args) [0x00007] in <cf39686ec6964e2795c81c2e7daf1fea>:0 
  at OpenRA.Program.Main (System.String[] args) [0x0004f] in <cf39686ec6964e2795c81c2e7daf1fea>:0 

the full logs are in:
raclassic-7bf26374def6e9e3d9ff50ece6c03d7b562e55cc.zip.

Thanks for your time,
Brenton

[fusion809]

Still occurs with commit no 145 (bf3b059).