caught an error when applying the yaml code and displey it in a debug dialog

gui/installer.py

@@ -228,9 +228,14 @@ class CodeEditorWidget(QWidget):
             self.status_label.setText(self.status_editor_code_changed)
 
     def apply_code(self):
+        try:
             tapes = yaml.safe_load(self.editor.toPlainText())
             self.parent.validation_widget.load_tapes(tapes)
 
+        except yaml.scanner.ScannerError as e:
+            dlg = DebugDialog(f"Error applying yaml code:\n\n{str(e)}")
+            dlg.exec()
+
 
 class TapeEditWidget(QWidget):
     def __init__(self, tape: dict, number: int | None = None):
@@ -513,6 +518,18 @@ class InstallWidget(QWidget):
         download_ffmpeg(self.ffmpeg_dir.directory)
         self.does_ffmpeg_exist()
 
+class DebugDialog(QDialog):
+    def __init__(self, text):
+        super().__init__()
+
+        self.setWindowTitle("Error and debug info")
+
+        self.description = QPlainTextEdit(text)
+        self.description.setEnabled(False)
+
+        layout = QVBoxLayout(self)
+        layout.addWidget(self.description)
+
 
 class MainWidget(QWidget):
     def __init__(self):

gui/widgets.py

@@ -2,7 +2,7 @@ from PySide6.QtCore import QSize, Qt, Slot, QRect, QFileSystemWatcher, Signal, Q
 from PySide6.QtGui import QIcon, QAction, QShortcut, QKeySequence, QPainter, QColor, QTextFormat, QPixmap, QFontMetrics
 from PySide6.QtWidgets import QApplication, QMainWindow, QPushButton, QWidget, QLabel, QVBoxLayout, QHBoxLayout, \
     QGroupBox, QLineEdit, QCheckBox, QSpinBox, QPlainTextEdit, QSizePolicy, QGridLayout, QTextEdit, QScrollArea, QFrame, \
-    QDoubleSpinBox, QFormLayout, QTimeEdit, QFileDialog
+    QDoubleSpinBox, QFormLayout, QTimeEdit, QFileDialog, QDialog
 
 import webbrowser
 import validators