Do not render preview if protocol between IJ & Gradle does not match (#2556)

gradle-plugins/preview-rpc/src/main/kotlin/org/jetbrains/compose/desktop/ui/tooling/preview/rpc/commands.kt

@@ -23,8 +23,9 @@ internal fun RemoteConnection.receiveAttach(
                 listener?.onError(
                     "Compose Multiplatform Gradle plugin version is not compatible with Intellij plugin version"
                 )
+            } else {
+                fn()
             }
-            fn()
         }
     }
 }

idea-plugin/src/main/kotlin/org/jetbrains/compose/desktop/ide/preview/ui/PreviewPanel.kt

@@ -39,7 +39,7 @@ internal class PreviewPanel(private val myProject: Project) : JBPanel<PreviewPan
         clear()
         appendLine(
             AllIcons.General.Error,
-            "Preview rendering encountered an error",
+            "Preview encountered an error",
             SimpleTextAttributes.REGULAR_ATTRIBUTES,
             null
         )