CultureNotFoundException

[furesoft]

Hi,
I get a CultureNotFoundException even when I set false or CultureInfo.DefaultThreadCurrentCulture = CultureInfo.InvariantCulture;

What am I doing wrong?

Unhandled Exception:
System.Globalization.CultureNotFoundException: Only the invariant culture is supported in globalization-invariant mode. See https://aka.ms/GlobalizationInvariantMode for more information. (Parameter 'name')
is an invalid culture identifier.
at System.Globalization.CultureInfo..ctor(String name, Boolean useUserOverride)
at System.Globalization.CultureInfo..ctor(String name)
at System.Reflection.AssemblyName..ctor(String assemblyName)
at System.Runtime.Loader.AssemblyLoadContext.MonoResolveUsingResolvingEvent(IntPtr gchALC, String assemblyName)