Help with screenshot API.

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Hi,
I am Rahul, a college student from India.
I am working on a project where I need to take screenshots of the screen
for further processing. From looking online and looking at the spectacle
code, I have figured out that you need to install the application in
/usr/bin and that the .desktop file must contain the following

X-DBUS-StartupType=Unique
X-DBUS-ServiceName=org.kde.koolintelligence
X-KDE-DBUS-Restricted-Interfaces=org.kde.KWin.ScreenShot2
X-KDE-Wayland-Interfaces=org_kde_plasma_window_management,zkde_screencast_unstable_v1

However, even after doing this, I am getting the following error

Screenshot failed: No such method 'CaptureWorkspace' in interface 'org.
kde.KWin.ScreenShot2' at object path '/org/kde/KWin/ScreenShot2' (signature
'')

My code is attached below for reference. Please let me know how I can
resolve this issue.

#include <QtDBus/QtDBus>
#include <QDBusUnixFileDescriptor>
#include "logging.hpp"
#include <fcntl.h>
static const QString screenShotService =
QString().fromStdString("org.kde.KWin.ScreenShot2");
static const QString screenShotObjectPath =
QString().fromStdString("/org/kde/KWin/ScreenShot2");
static const QString screenShotInterface =
QString().fromStdString("org.kde.KWin.ScreenShot2");
void takeScreenshotKwin(std::string path) {
    // Connect to KWin's screenshot service
    QDBusInterface interface(
        screenShotService,
        screenShotObjectPath,
        screenShotInterface,
        QDBusConnection::sessionBus() // Bus connection
    );

    if (!interface.isValid()) {
        LOG_ERROR("takeScreenshotKwin", "Failed to connect to KWin
Screenshot interface");
        return;
    }

    QDBusReply<QString> reply =
interface.call(QString().fromStdString("CaptureWorkspace"));

    if (reply.isValid()) {
        LOG_INFO("takeScreenshotKwin", "Screenshot saved at: " + path);
    } else {
        LOG_ERROR("takeScreenshotKwin", "Screenshot failed: " +
reply.error().message().toStdString());
    }
}

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<div dir=3D"ltr">Hi,<div>I am Rahul, a college student from India.</div><di=
v>I am working on a project where=C2=A0I need to take screenshots of the sc=
reen for further processing. From looking online and looking at the spectac=
le code, I have figured out that you need to install the application in /us=
r/bin and that the .desktop file must contain the following</div><div><br><=
/div><div>X-DBUS-StartupType=3DUnique<br>X-DBUS-ServiceName=3Dorg.kde.kooli=
ntelligence<br>X-KDE-DBUS-Restricted-Interfaces=3Dorg.kde.KWin.ScreenShot2<=
br>X-KDE-Wayland-Interfaces=3Dorg_kde_plasma_window_management,zkde_screenc=
ast_unstable_v1<br></div><div><br></div><div>However, even after doing this=
, I am getting the following error</div><div><br></div><div><span style=3D"=
font-family:monospace"><span style=3D"color:rgb(0,0,0)">Screenshot failed: =
No such method &#39;CaptureWorkspace&#39; in interface &#39;org.</span><br>=
kde.KWin.ScreenShot2&#39; at object path &#39;/org/kde/KWin/ScreenShot2&#39=
; (signature &#39;&#39;)<br></span></div><div><span style=3D"font-family:mo=
nospace"><br></span></div><div>My code is attached below for reference. Ple=
ase let me know how I can resolve this issue.</div><div><br></div><div>#inc=
lude &lt;QtDBus/QtDBus&gt;<br>#include &lt;QDBusUnixFileDescriptor&gt;<br>#=
include &quot;logging.hpp&quot;<br>#include &lt;fcntl.h&gt;<br>static const=
 QString screenShotService =3D QString().fromStdString(&quot;org.kde.KWin.S=
creenShot2&quot;);<br>static const QString screenShotObjectPath =3D QString=
().fromStdString(&quot;/org/kde/KWin/ScreenShot2&quot;);<br>static const QS=
tring screenShotInterface =3D QString().fromStdString(&quot;org.kde.KWin.Sc=
reenShot2&quot;);<br>void takeScreenshotKwin(std::string path) {<br>=C2=A0 =
=C2=A0 // Connect to KWin&#39;s screenshot service<br>=C2=A0 =C2=A0 QDBusIn=
terface interface(<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 screenShotService,<br>=C2=
=A0 =C2=A0 =C2=A0 =C2=A0 screenShotObjectPath,<br>=C2=A0 =C2=A0 =C2=A0 =C2=
=A0 screenShotInterface,<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 QDBusConnection::se=
ssionBus() // Bus connection<br>=C2=A0 =C2=A0 );<br><br>=C2=A0 =C2=A0 if (!=
interface.isValid()) {<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 LOG_ERROR(&quot;takeS=
creenshotKwin&quot;, &quot;Failed to connect to KWin Screenshot interface&q=
uot;);<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 return;<br>=C2=A0 =C2=A0 }<br>=C2=A0<=
br>=C2=A0 =C2=A0 QDBusReply&lt;QString&gt; reply =3D interface.call(QString=
().fromStdString(&quot;CaptureWorkspace&quot;));<br><br>=C2=A0 =C2=A0 if (r=
eply.isValid()) {<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 LOG_INFO(&quot;takeScreens=
hotKwin&quot;, &quot;Screenshot saved at: &quot; + path);<br>=C2=A0 =C2=A0 =
} else {<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 LOG_ERROR(&quot;takeScreenshotKwin&=
quot;, &quot;Screenshot failed: &quot; + reply.error().message().toStdStrin=
g());<br>=C2=A0 =C2=A0 }<br>}<br></div></div>

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