Use built-in BoolConverters.Not
DELETE
WalletWasabi.Fluent/Converters/BoolConverters.cs
-using Avalonia.Data.Converters;
-
-namespace WalletWasabi.Fluent.Converters
-{
- public static class BoolConverters
- {
- public static readonly IValueConverter Not =
- new FuncValueConverter<bool, bool>(x => !x);
- }
-}
\ No newline at end of file

MODIFY
WalletWasabi.Fluent/Views/Wallets/WalletView.axaml
WalletWasabi.Fluent/Views/Wallets/WalletView.axaml
<Button.IsVisible>
<MultiBinding Converter="{x:Static BoolConverters.And}">
<Binding Path="PreferPsbtWorkflow"/>
- <Binding Path="IsWalletBalanceZero" Converter="{x:Static converters:BoolConverters.Not}"/>
+ <Binding Path="IsWalletBalanceZero" Converter="{x:Static BoolConverters.Not}"/>
</MultiBinding>
</Button.IsVisible>
<StackPanel Orientation="Horizontal" Spacing="15">

Use built-in BoolConverters.Not