diff --git a/internal/frontend/bridge-gui/bridge-gui-tester/GRPCService.cpp b/internal/frontend/bridge-gui/bridge-gui-tester/GRPCService.cpp
index b43c9489..90c7704f 100644
--- a/internal/frontend/bridge-gui/bridge-gui-tester/GRPCService.cpp
+++ b/internal/frontend/bridge-gui/bridge-gui-tester/GRPCService.cpp
@@ -392,7 +392,7 @@ Status GRPCService::Login(ServerContext *, LoginRequest const *request, Empty *)
     loginUsername_ = QString::fromStdString(request->username());
     if (usersTab.nextUserUsernamePasswordError())
     {
-        qtProxy_.sendDelayedEvent(newLoginError(LoginErrorType::USERNAME_PASSWORD_ERROR, "Username/password error."));
+        qtProxy_.sendDelayedEvent(newLoginError(LoginErrorType::USERNAME_PASSWORD_ERROR, usersTab.usernamePasswordErrorMessage()));
         return Status::OK;
     }
     if (usersTab.nextUserFreeUserError())
diff --git a/internal/frontend/bridge-gui/bridge-gui-tester/Tabs/UsersTab.cpp b/internal/frontend/bridge-gui/bridge-gui-tester/Tabs/UsersTab.cpp
index 76ff5650..b7e2bbfd 100644
--- a/internal/frontend/bridge-gui/bridge-gui-tester/Tabs/UsersTab.cpp
+++ b/internal/frontend/bridge-gui/bridge-gui-tester/Tabs/UsersTab.cpp
@@ -51,6 +51,7 @@ UsersTab::UsersTab(QWidget *parent)
     connect(ui_.buttonEditUser, &QPushButton::clicked, this, &UsersTab::onEditUserButton);
     connect(ui_.tableUserList, &QTableView::doubleClicked, this, &UsersTab::onEditUserButton);
     connect(ui_.buttonRemoveUser, &QPushButton::clicked, this, &UsersTab::onRemoveUserButton);
+    connect(ui_.checkUsernamePasswordError, &QCheckBox::toggled, this, &UsersTab::updateGUIState);
 
     users_.append(randomUser());
 
@@ -129,6 +130,7 @@ void UsersTab::updateGUIState()
     bool const hasSelectedUser = ui_.tableUserList->selectionModel()->hasSelection();
     ui_.buttonEditUser->setEnabled(hasSelectedUser);
     ui_.buttonRemoveUser->setEnabled(hasSelectedUser);
+    ui_.editUsernamePasswordError->setEnabled(ui_.checkUsernamePasswordError->isChecked());
 }
 
 
@@ -252,6 +254,15 @@ bool UsersTab::nextUserAlreadyLoggedIn() const
 }
 
 
+//****************************************************************************************************************************************************
+/// \return the message for the username/password error.
+//****************************************************************************************************************************************************
+QString UsersTab::usernamePasswordErrorMessage() const
+{
+    return ui_.editUsernamePasswordError->text();
+}
+
+
 //****************************************************************************************************************************************************
 /// \param[in] userID The userID.
 /// \param[in] makeItActive Should split mode be activated.
diff --git a/internal/frontend/bridge-gui/bridge-gui-tester/Tabs/UsersTab.h b/internal/frontend/bridge-gui/bridge-gui-tester/Tabs/UsersTab.h
index 55a44c49..11e9f385 100644
--- a/internal/frontend/bridge-gui/bridge-gui-tester/Tabs/UsersTab.h
+++ b/internal/frontend/bridge-gui/bridge-gui-tester/Tabs/UsersTab.h
@@ -48,6 +48,7 @@ public: // member functions.
     bool nextUserTwoPasswordsError() const; ///< Check if next user login should trigger 2nd password error.
     bool nextUserTwoPasswordsAbort() const; ///< Check if next user login should trigger 2nd password abort.
     bool nextUserAlreadyLoggedIn() const; ///< Check if next user login should report user as already logged in.
+    QString usernamePasswordErrorMessage() const; ///< Return the username password error message.
 
 public slots:
     void setUserSplitMode(QString const &userID, bool makeItActive); ///< Slot for the split mode.
@@ -60,9 +61,9 @@ private slots:
     void onEditUserButton(); ///< Edit the currently selected user.
     void onRemoveUserButton(); ///< Remove the currently selected user.
     void onSelectionChanged(QItemSelection, QItemSelection); ///< Slot for the change of the selection.
+    void updateGUIState(); ///< Update the GUI state.
 
 private: // member functions.
-    void updateGUIState(); ///< Update the GUI state.
     qint32 selectedIndex() const; ///< Get the index of the selected row.
     bridgepp::SPUser selectedUser(); ///< Get the selected user.
 
diff --git a/internal/frontend/bridge-gui/bridge-gui-tester/Tabs/UsersTab.ui b/internal/frontend/bridge-gui/bridge-gui-tester/Tabs/UsersTab.ui
index ce297a51..ad4db4ee 100644
--- a/internal/frontend/bridge-gui/bridge-gui-tester/Tabs/UsersTab.ui
+++ b/internal/frontend/bridge-gui/bridge-gui-tester/Tabs/UsersTab.ui
@@ -6,14 +6,14 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>1207</width>
-    <height>709</height>
+    <width>1225</width>
+    <height>717</height>
    </rect>
   </property>
   <property name="windowTitle">
    <string>Form</string>
   </property>
-  <layout class="QHBoxLayout" name="horizontalLayout">
+  <layout class="QHBoxLayout" name="horizontalLayout" stretch="1,0">
    <item>
     <widget class="QTableView" name="tableUserList">
      <property name="selectionMode">
@@ -81,10 +81,46 @@
         <item>
          <widget class="QCheckBox" name="checkUsernamePasswordError">
           <property name="text">
-           <string>Username/password error</string>
+           <string>Username/password error:</string>
           </property>
          </widget>
         </item>
+        <item>
+         <layout class="QHBoxLayout" name="horizontalLayout_2">
+          <property name="spacing">
+           <number>0</number>
+          </property>
+          <item>
+           <spacer name="horizontalSpacer">
+            <property name="orientation">
+             <enum>Qt::Horizontal</enum>
+            </property>
+            <property name="sizeType">
+             <enum>QSizePolicy::Fixed</enum>
+            </property>
+            <property name="sizeHint" stdset="0">
+             <size>
+              <width>20</width>
+              <height>10</height>
+             </size>
+            </property>
+           </spacer>
+          </item>
+          <item>
+           <widget class="QLineEdit" name="editUsernamePasswordError">
+            <property name="minimumSize">
+             <size>
+              <width>200</width>
+              <height>0</height>
+             </size>
+            </property>
+            <property name="text">
+             <string>Username/password error.</string>
+            </property>
+           </widget>
+          </item>
+         </layout>
+        </item>
         <item>
          <widget class="QCheckBox" name="checkFreeUserError">
           <property name="text">
diff --git a/internal/frontend/bridge-gui/bridge-gui/qml/SignIn.qml b/internal/frontend/bridge-gui/bridge-gui/qml/SignIn.qml
index b263a4b2..4be8e088 100644
--- a/internal/frontend/bridge-gui/bridge-gui/qml/SignIn.qml
+++ b/internal/frontend/bridge-gui/bridge-gui/qml/SignIn.qml
@@ -185,13 +185,15 @@ FocusScope {
                 ColorImage {
                     color: root.colorScheme.signal_danger
                     source: "/qml/icons/ic-exclamation-circle-filled.svg"
-                    height: errorLabel.height
-                    sourceSize.height: errorLabel.height
+                    height: errorLabel.lineHeight
+                    sourceSize.height: errorLabel.lineHeight
                 }
 
                 Label {
                     colorScheme: root.colorScheme
                     id: errorLabel
+                    wrapMode: Text.WordWrap
+                    Layout.fillWidth: true;
                     Layout.leftMargin: 4
                     color: root.colorScheme.signal_danger