inno setup installer creation failed: undefined method encode for #<Ocra::Pathname:

[kematy]

When I run ocra:
ocra xlsx2dxf.rb --no-lzma --chdir-first --innosetup xlsx2dxf.iss --windows
I got
xlsx2dxf.iss: inno setup installer creation failed: undefined method encode for #<Ocra::Pathname:...
I want to know why and how solve it.
; Script generated by the Inno Setup Script Wizard.
; SEE THE DOCUMENTATION FOR DETAILS ON CREATING INNO SETUP SCRIPT FILES!

[Setup]
; NOTE: The value of AppId uniquely identifies this application. Do not use the same AppId value in installers for other applications.
; (To generate a new GUID, click Tools | Generate GUID inside the IDE.)
AppId={{5EF3D4BF-0B29-4C06-9C06-CD60892FDAA8}
AppName=ExcelToDXF
AppVersion=1.0
;AppVerName=ExcelToDXF 1.0
AppPublisher=FSTL
AppPublisherURL=151711064@qq.com
AppSupportURL=151711064@qq.com
AppUpdatesURL=151711064@qq.com
DefaultDirName={autopf}\xlsx2DXF
DisableProgramGroupPage=yes
InfoAfterFile=D:\ruby-project\xlsx2dxf\encprted\xlsx2dxf\注册及使用说明.txt
; Uncomment the following line to run in non administrative install mode (install for current user only.)
;PrivilegesRequired=lowest
OutputBaseFilename=mysetup
Compression=lzma
SolidCompression=yes
WizardStyle=modern

[Languages]
Name: "english"; MessagesFile: "compiler:Default.isl"

[Tasks]
Name: "desktopicon"; Description: "{cm:CreateDesktopIcon}"; GroupDescription: "{cm:AdditionalIcons}"; Flags: unchecked

[Files]
Source: "D:\ruby-project\xlsx2dxf\encprted\xlsx2dxf\xlsx2dxf.exe"; DestDir: "{app}"; Flags: ignoreversion
Source: "D:\ruby-project\xlsx2dxf\encprted\xlsx2dxf\drw.so"; DestDir: "{app}"; Flags: ignoreversion
Source: "D:\ruby-project\xlsx2dxf\encprted\xlsx2dxf\jydisk.dll"; DestDir: "{app}"; Flags: ignoreversion
Source: "D:\ruby-project\xlsx2dxf\encprted\xlsx2dxf\pub_key.pem"; DestDir: "{app}"; Flags: ignoreversion
Source: "D:\ruby-project\xlsx2dxf\encprted\xlsx2dxf\test_kk.xlsx"; DestDir: "{app}"; Flags: ignoreversion
Source: "D:\ruby-project\xlsx2dxf\encprted\xlsx2dxf\注册及使用说明.txt"; DestDir: "{app}"; Flags: ignoreversion
Source: "D:\ruby-project\xlsx2dxf\encprted\rgloader*"; DestDir: "{app}"; Flags: ignoreversion recursesubdirs createallsubdirs
; NOTE: Don't use "Flags: ignoreversion" on any shared system files

[Icons]
Name: "{autoprograms}\ExcelToDXF"; Filename: "{app}\xlsx2dxf.exe"
Name: "{autodesktop}\ExcelToDXF"; Filename: "{app}\xlsx2dxf.exe"; Tasks: desktopicon

[Run]
Filename: "{app}\xlsx2dxf.exe"; Description: "{cm:LaunchProgram,ExcelToDXF}"; Flags: nowait postinstall skipifsilent

[kematy]

I delete [Files],got the same error