LibICU not being detected on Debian GNU/Linux 12 (bookworm)

[froglegseternal]

I ran into the following error when just trying to run the help flag with bruteshark:

(john) (base) froglegs@Debian:~/Documents/rootme/challs$ ./BruteSharkCli --help
Process terminated. Couldn't find a valid ICU package installed on the system. Set the configuration flag System.Globalization.Invariant to true if you want to run with no globalization support.
   at System.Environment.FailFast(System.String)
   at System.Globalization.GlobalizationMode.GetGlobalizationInvariantMode()
   at System.Globalization.GlobalizationMode..cctor()
   at System.Globalization.CultureData.CreateCultureWithInvariantData()
   at System.Globalization.CultureData.get_Invariant()
   at System.Globalization.CultureInfo..cctor()
   at System.Globalization.CultureInfo.get_CurrentCulture()
   at System.Text.RegularExpressions.Regex..ctor(System.String, System.Text.RegularExpressions.RegexOptions, System.TimeSpan, Boolean)
   at System.Text.RegularExpressions.Regex..ctor(System.String)
   at PcapAnalyzer.FtpPasswordParser..ctor()
   at System.RuntimeTypeHandle.CreateInstance(System.RuntimeType, Boolean, Boolean, Boolean ByRef, System.RuntimeMethodHandleInternal ByRef, Boolean ByRef)
   at System.RuntimeType.CreateInstanceDefaultCtorSlow(Boolean, Boolean, Boolean)
   at System.RuntimeType.CreateInstanceDefaultCtor(Boolean, Boolean, Boolean, Boolean)
   at System.Activator.CreateInstance(System.Type, Boolean, Boolean)
   at System.Activator.CreateInstance(System.Type)
   at PcapAnalyzer.PasswordsModule+<>c.<_initilyzePasswordParsersList>b__10_2(System.Type)
   at System.Linq.Enumerable+WhereSelectEnumerableIterator`2[[System.__Canon, System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].ToList()
   at System.Linq.Enumerable.ToList[[System.__Canon, System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]](System.Collections.Generic.IEnumerable`1)
   at PcapAnalyzer.PasswordsModule._initilyzePasswordParsersList()
   at PcapAnalyzer.PasswordsModule..ctor()
   at System.RuntimeTypeHandle.CreateInstance(System.RuntimeType, Boolean, Boolean, Boolean ByRef, System.RuntimeMethodHandleInternal ByRef, Boolean ByRef)
   at System.RuntimeType.CreateInstanceDefaultCtorSlow(Boolean, Boolean, Boolean)
   at System.RuntimeType.CreateInstanceDefaultCtor(Boolean, Boolean, Boolean, Boolean)
   at System.Activator.CreateInstance(System.Type, Boolean, Boolean)
   at System.Activator.CreateInstance(System.Type)
   at PcapAnalyzer.Analyzer+<>c.b__17_2(System.Type)
   at System.Linq.Enumerable+WhereSelectEnumerableIterator`2[[System.__Canon, System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e],[System.__Canon, System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].ToList()
   at System.Linq.Enumerable.ToList[[System.__Canon, System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]](System.Collections.Generic.IEnumerable`1)
   at PcapAnalyzer.Analyzer.InitilyzeModulesList()
   at PcapAnalyzer.Analyzer..ctor()
   at BruteSharkCli.BruteSharkCli..ctor(System.String[])
   at BruteSharkCli.Program.Main(System.String[])
Aborted

This might be something upstream, but I have multiple libicu packages installed - both libicu72 and libicu-dev. Would love to be able to provide more information, but I'm not too familiar with C# and wouldn't even know where to begin trying to debug this.