Sending message to user with some symbol in name

[StewieBiatch]

I was unable to send a message via bot to players with some symbol in their name.

SPOILER

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20230614 13:13:11 Error RequestResponse at de.mfbot.MFBot_NG.Basisbibliothek.Response.I() in File93:line 767
Message: The given key was not present in the dictionary.
HResult: -2146232969
Source: mscorlib
StackTrace: at System.ThrowHelper.ThrowKeyNotFoundException()
at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
at de.mfbot.MFBot_NG.Basisbibliothek.Response.I(Command I, Dictionary`2 D, Dictionary`2 T, Account S) in File93:line 933
at de.mfbot.MFBot_NG.Basisbibliothek.Response.I() in File93:line 767
at de.mfbot.MFBot_NG.Basisbibliothek.Response.Build() in File93:line 298
at de.mfbot.MFBot_NG.Basisbibliothek.BaseResponse.I(String I, Command D, Account T) in File110:line 170
at de.mfbot.MFBot_NG.Basisbibliothek.Server.S(Account I, Command D, DateTime T, String S) in File193:line 847
at de.mfbot.MFBot_NG.Basisbibliothek.Server.S(Account I, Command D) in File193:line 817
at de.mfbot.MFBot_NG.Basisbibliothek.Server.send(Account acc, Command cmd) in File193:line 635
TargetSite: Void ThrowKeyNotFoundException()

These are the text which are in log instead of symbols "xE9", "x9A", "xE4", "xF9"