BUG: Font Missing Causes Crash Startup

[AgyemanVertigo]

Checks

• I have checked that this issue has not already been reported.

• I am using the latest version of Flow Launcher.

• I am using the prerelease version of Flow Launcher.

Problem Description

Flow launcher crashed with the message reproduced below. OneCommander and Everything are installed. Alldup was installed but unsinstalled now.

To Reproduce

1. Computer just started
2. ...
3. ...

Screenshots

Flow Launcher version: 1.20.0
OS Version: 19045.5965
IntPtr Length: 8
x64: True

Python Path:
Node Path:

Date: 06/12/2025 08:26:26
Exception:
System.IO.FileNotFoundException: Unable to find the specified file.
at MS.Internal.Text.TextInterface.Native.Util.ConvertHresultToException(Int32 hr)
at MS.Internal.Text.TextInterface.Font.CreateFontFace()
at MS.Internal.Text.TextInterface.Font.AddFontFaceToCache()
at MS.Internal.Text.TextInterface.Font.GetFontFace()
at System.Windows.Media.GlyphTypeface..ctor(Font font)
at MS.Internal.FontFace.PhysicalFontFamily.GetGlyphTypeface(FontStyle style, FontWeight weight, FontStretch stretch)
at System.Windows.Media.Typeface.ConstructCachedTypeface()
at System.Windows.Media.Typeface.get_CachedTypeface()
at MS.Internal.TextFormatting.SimpleTextLine..ctor(FormatSettings settings, Int32 cpFirst, Int32 paragraphWidth, ArrayList runs, Int32& trailing, Int32& trailingSpaceWidth, Double pixelsPerDip)
at MS.Internal.TextFormatting.SimpleTextLine.Create(FormatSettings settings, Int32 cpFirst, Int32 paragraphWidth, Double pixelsPerDip)
at MS.Internal.TextFormatting.TextFormatterImp.FormatLineInternal(TextSource textSource, Int32 firstCharIndex, Int32 lineLength, Double paragraphWidth, TextParagraphProperties paragraphProperties, TextLineBreak previousLineBreak, TextRunCache textRunCache)
at MS.Internal.TextFormatting.TextFormatterImp.FormatLine(TextSource textSource, Int32 firstCharIndex, Double paragraphWidth, TextParagraphProperties paragraphProperties, TextLineBreak previousLineBreak, TextRunCache textRunCache)
at System.Windows.Controls.TextBoxLine.Format(Int32 dcp, Double formatWidth, Double paragraphWidth, LineProperties lineProperties, TextRunCache textRunCache, TextFormatter formatter)
at System.Windows.Controls.TextBoxView.FullMeasureTick(Double constraintWidth, LineProperties lineProperties)
at System.Windows.Controls.TextBoxView.MeasureOverride(Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
at System.Windows.Controls.ScrollContentPresenter.MeasureOverride(Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at System.Windows.Controls.Grid.MeasureCell(Int32 cell, Boolean forceInfinityV)
at System.Windows.Controls.Grid.MeasureCellsGroup(Int32 cellsHead, Size referenceSize, Boolean ignoreDesiredSizeU, Boolean forceInfinityV, Boolean& hasDesiredSizeUChanged)
at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at System.Windows.Controls.Border.MeasureOverride(Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at System.Windows.Controls.ScrollViewer.MeasureOverride(Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at System.Windows.Controls.Border.MeasureOverride(Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at System.Windows.Controls.Control.MeasureOverride(Size constraint)
at System.Windows.Controls.TextBox.MeasureOverride(Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at System.Windows.Controls.Border.MeasureOverride(Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at System.Windows.Controls.Grid.MeasureOverride(Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at System.Windows.Controls.StackPanel.StackMeasureHelper(IStackMeasure measureElement, IStackMeasureScrollData scrollData, Size constraint)
at System.Windows.Controls.StackPanel.MeasureOverride(Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at System.Windows.Controls.Border.MeasureOverride(Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at MS.Internal.Helper.MeasureElementWithSingleChild(UIElement element, Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at System.Windows.Controls.Decorator.MeasureOverride(Size constraint)
at System.Windows.Documents.AdornerDecorator.MeasureOverride(Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at System.Windows.Controls.Border.MeasureOverride(Size constraint)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at System.Windows.Window.MeasureOverrideHelper(Size constraint)
at System.Windows.Window.MeasureOverride(Size availableSize)
at System.Windows.FrameworkElement.MeasureCore(Size availableSize)
at System.Windows.UIElement.Measure(Size availableSize)
at System.Windows.Interop.HwndSource.SetLayoutSize()
at System.Windows.Interop.HwndSource.set_RootVisualInternal(Visual value)
at System.Windows.Window.SetRootVisualAndUpdateSTC()
at System.Windows.Window.SetupInitialState(Double requestedTop, Double requestedLeft, Double requestedWidth, Double requestedHeight)
at System.Windows.Window.CreateSourceWindow(Boolean duringShow)
at System.Windows.Window.ShowHelper(Object booleanBox)
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

Flow Launcher Version

1.20.0

Windows Build Number

10.0.19045.5965

Error Log

2025-06-12.txt

[Jack251970]

@onesounds Could you please check it? It looks like it is related to font setting.

[Jack251970]

@AgyemanVertigo Could you please provide your setting file? And have you changed anything related to font settings?

[onesounds]

The error is happening because the font you’ve configured doesn’t actually exist. It’s probably originating from either the main window or the settings window—check which one it is and add appropriate exception handling.

[onesounds]

@Jack251970 I’ve confirmed that the font-loading works without errors even if the specified font doesn’t actually exist. After reviewing the attached TXT log, it looks like there’s an issue in the .NET environment (the log shows that DirectWriteForwarder.dll is missing). I suspect the user’s .NET Desktop Runtime installation is corrupted.

[Jack251970]

@AgyemanVertigo Could you please try .Net 7.0 runtime reinstallation?

[AgyemanVertigo]

I just changed the size of the font. But now it should be the original size :

[AgyemanVertigo]

I have the NET Runtime v8.0.16 (x64). I try to reinstall the v7.0