use using instead of clr-namespace
MODIFY
WalletWasabi.Fluent/Views/Login/LoginView.axaml
WalletWasabi.Fluent/Views/Login/LoginView.axaml
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
- xmlns:c="clr-namespace:WalletWasabi.Fluent.Controls"
- xmlns:login="clr-namespace:WalletWasabi.Fluent.ViewModels.Login"
- xmlns:conv="clr-namespace:WalletWasabi.Fluent.Converters"
+ xmlns:c="using:WalletWasabi.Fluent.Controls"
+ xmlns:login="using:WalletWasabi.Fluent.ViewModels.Login"
+ xmlns:conv="using:WalletWasabi.Fluent.Converters"
xmlns:behaviors="using:WalletWasabi.Fluent.Behaviors"
xmlns:i="using:Avalonia.Xaml.Interactivity"
mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"

MODIFY
WalletWasabi.Fluent/Views/Wallets/ClosedHardwareWalletView.axaml
WalletWasabi.Fluent/Views/Wallets/ClosedHardwareWalletView.axaml
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
- xmlns:c="using:WalletWasabi.Fluent.Controls"
- xmlns:login="clr-namespace:WalletWasabi.Fluent.Views.Login"
mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
x:Class="WalletWasabi.Fluent.Views.Wallets.ClosedHardwareWalletView">
Hello Wasabi!

MODIFY
WalletWasabi.Fluent/Views/Wallets/ClosedWalletView.axaml
WalletWasabi.Fluent/Views/Wallets/ClosedWalletView.axaml
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
- xmlns:c="using:WalletWasabi.Fluent.Controls"
- xmlns:local="using:WalletWasabi.Fluent.Views.Wallets"
- xmlns:login="clr-namespace:WalletWasabi.Fluent.Views.Login"
mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
x:Class="WalletWasabi.Fluent.Views.Wallets.ClosedWalletView">
Hello Wasabi!

use using instead of clr-namespace