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()
         }
     }
 }