Set the folder settings

.idea/ProjetJavaFX.iml

@@ -1,8 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <module type="JAVA_MODULE" version="4">
   <component name="NewModuleRootManager" inherit-compiler-output="true">
-    <exclude-output />
-    <content url="file://$MODULE_DIR$" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/Source/resource" type="java-resource" />
+      <sourceFolder url="file://$MODULE_DIR$/Source/src" isTestSource="false" />
+      <excludeFolder url="file://$MODULE_DIR$/Source/out" />
+    </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
   </component>

.idea/misc.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
   <component name="ProjectRootManager" version="2" project-jdk-name="liberica-18" project-jdk-type="JavaSDK">
-    <output url="file://$PROJECT_DIR$/out" />
+    <output url="file://$PROJECT_DIR$/Source/out" />
   </component>
 </project>

Source/out/production/StationMeteo/fxml/FenetrePrincipale.fxml

@@ -1,5 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-
-<?import javafx.scene.layout.*?>
-
-<Pane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/11.0.14-internal" xmlns:fx="http://javafx.com/fxml/1" />