diff --git a/.gitignore b/.gitignore
--- a/.gitignore
+++ b/.gitignore
@@ -9,6 +9,8 @@
 .ycm_extra_conf.py
 .ycm_extra_conf.pyc
 .clang_complete
+.clangd
+.ccls-cache
 kactivities.kdev4
 compile_commands.json
 /apidocs
diff --git a/kded/engine/backends/cryfs/cryfsbackend.cpp b/kded/engine/backends/cryfs/cryfsbackend.cpp
--- a/kded/engine/backends/cryfs/cryfsbackend.cpp
+++ b/kded/engine/backends/cryfs/cryfsbackend.cpp
@@ -193,7 +193,8 @@
 
             // otherwise just report that we failed
                 Result<>::error(Error::CommandError,
-                                i18n("Unable to perform the operation (error code %1).", QString::number((int)exitCode)));
+                                i18n("Unable to perform the operation (error code %1).", QString::number((int)exitCode)),
+                                out, err);
 
 
         });
diff --git a/kded/engine/commandresult.h b/kded/engine/commandresult.h
--- a/kded/engine/commandresult.h
+++ b/kded/engine/commandresult.h
@@ -35,17 +35,22 @@
         DeviceError,
         BackendError,
         CommandError,
-        DeletionError
+        DeletionError,
+        UnknownError
     };
 
-    Error(Code code, const QString &message = QString());
+    Error(Code code = UnknownError, const QString &message = {}, const QString &out = {}, const QString &err = {});
 
     Code code() const;
     QString message() const;
+    QString out() const;
+    QString err() const;
 
 private:
     Code m_code;
     QString m_message;
+    QString m_out;
+    QString m_err;
 };
 
 
@@ -59,10 +64,10 @@
 
 
 inline
-FutureResult<> errorResult(Error::Code error, const QString &message)
+FutureResult<> errorResult(Error::Code error, const QString &message, const QString &out = {}, const QString &err = {})
 {
     qWarning() << message;
-    return makeReadyFuture(Result<>::error(error, message));
+    return makeReadyFuture(Result<>::error(error, message, out, err));
 }
 
 
diff --git a/kded/engine/commandresult.cpp b/kded/engine/commandresult.cpp
--- a/kded/engine/commandresult.cpp
+++ b/kded/engine/commandresult.cpp
@@ -22,9 +22,11 @@
 
 namespace PlasmaVault {
 
-Error::Error(Code code, const QString &message)
+Error::Error(Code code, const QString &message, const QString &out, const QString &err)
     : m_code(code)
     , m_message(message)
+    , m_out(out)
+    , m_err(err)
 {
 }
 
@@ -38,5 +40,15 @@
     return m_message;
 }
 
+QString Error::out() const
+{
+    return m_out;
+}
+
+QString Error::err() const
+{
+    return m_err;
+}
+
 } // namespace PlasmaVault
 
diff --git a/kded/engine/fusebackend_p.cpp b/kded/engine/fusebackend_p.cpp
--- a/kded/engine/fusebackend_p.cpp
+++ b/kded/engine/fusebackend_p.cpp
@@ -66,7 +66,8 @@
 
         // otherwise just report that we failed
             Result<>::error(Error::CommandError,
-                            i18n("Unable to perform the operation"));
+                            i18n("Unable to perform the operation"),
+                            out, err);
 }
 
 
diff --git a/kded/ui/mountdialog.h b/kded/ui/mountdialog.h
--- a/kded/ui/mountdialog.h
+++ b/kded/ui/mountdialog.h
@@ -25,7 +25,10 @@
 
 #include "ui_mountdialog.h"
 
+#include "engine/vault.h"
+
 class KMessageWidget;
+class QAction;
 
 namespace PlasmaVault {
     class Vault;
@@ -43,6 +46,8 @@
     PlasmaVault::Vault *m_vault;
     Ui_MountDialog m_ui;
     KMessageWidget* m_errorLabel;
+    QAction* m_detailsAction;
+    PlasmaVault::Error m_lastError;
 };
 
 #endif
diff --git a/kded/ui/mountdialog.cpp b/kded/ui/mountdialog.cpp
--- a/kded/ui/mountdialog.cpp
+++ b/kded/ui/mountdialog.cpp
@@ -18,11 +18,12 @@
  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 #include "mountdialog.h"
-#include "engine/vault.h"
 
 #include <QCloseEvent>
 #include <QStyle>
 #include <QStyleOption>
+#include <QAction>
+#include <QMessageBox>
 
 #include <KMessageWidget>
 
@@ -37,6 +38,28 @@
     m_errorLabel->setIcon(QIcon::fromTheme("dialog-error"));
     m_errorLabel->setVisible(false);
 
+    m_detailsAction = new QAction(this);
+    m_detailsAction->setToolTip(i18n("Details..."));
+    m_detailsAction->setIcon(QIcon::fromTheme("view-list-details"));
+
+    connect(m_detailsAction, &QAction::triggered,
+            this, [this] {
+                QString message;
+                const auto out = m_lastError.out().trimmed();
+                const auto err = m_lastError.err().trimmed();
+
+                if (!out.isEmpty() && !err.isEmpty()) {
+                    message = i18n("Command output:\n%1\n\nError output: %2", m_lastError.out(), m_lastError.err());
+                } else {
+                    message = out + err;
+                }
+
+                auto messageBox = new QMessageBox(QMessageBox::Critical, i18n("Error details"), message, QMessageBox::Ok, this);
+                messageBox->setAttribute(Qt::WA_DeleteOnClose);
+                messageBox->show();
+
+            });
+
     auto errorLabelSizePolicy = m_errorLabel->sizePolicy();
     errorLabelSizePolicy.setHorizontalPolicy(QSizePolicy::Expanding);
     m_errorLabel->setSizePolicy(errorLabelSizePolicy);
@@ -68,9 +91,17 @@
     if (result) {
         QDialog::accept();
     } else {
-        qDebug() << "We've got an error" <<  result.error().message();
-        // m_ui.errorLabel->setText(i18n("Failed to open: %1").arg(result.error().message()));
-        m_errorLabel->setText(i18n("Failed to open: %1", result.error().message()));
+        m_lastError = result.error();
+
+        m_errorLabel->setText(i18n("Failed to open: %1", m_lastError.message()));
         m_errorLabel->setVisible(true);
+
+        if (!m_lastError.out().isEmpty() || !m_lastError.err().isEmpty()) {
+            m_errorLabel->addAction(m_detailsAction);
+
+        } else {
+            m_errorLabel->removeAction(m_detailsAction);
+
+        }
     }
 }