mafia_mafia-game.1.gqg644859o6w@docker | System.NullReferenceException: Object reference not
set to an instance of an object.
mafia_mafia-game.1.gqg644859o6w@docker | at UltraMafia.Frontend.Telegram.TelegramFrontend
Extensions.CreateOrUpdateRegistrationMessage(ITelegramBotClient bot, GameSession session, Teleg
ramFrontendSettings settings) in /tmp/src/UltraMafia/Frontend/Telegram/TelegramFrontendExtensio
ns.cs:line 109
mafia_mafia-game.1.gqg644859o6w@docker | at UltraMafia.Frontend.Telegram.TelegramFrontend
.<>c__DisplayClass33_0.<<OnGamerJoined>b__0>d.MoveNext() in /tmp/src/UltraMafia/Frontend/Telegr
am/TelegramFrontend.cs:line 562
mafia_mafia-game.1.gqg644859o6w@docker | --- End of stack trace from previous location where
exception was thrown ---
mafia_mafia-game.1.gqg644859o6w@docker | at UltraMafia.Frontend.Telegram.TelegramFrontend
Extensions.LockAndDo(ITelegramBotClient bot, Func`1 action) in /tmp/src/UltraMafia/Frontend/Tel
egram/TelegramFrontendExtensions.cs:line 171
Fixes this issue: