Cherry pick fix

Author: blazoncek

wled00/wled.cpp

@@ -439,7 +439,7 @@ void WLED::setup()
   UsermodManager::setup();
   DEBUG_PRINTF_P(PSTR("heap %u\n"), ESP.getFreeHeap());
 
-  if (needsCfgSave) serializeConfigToFS(); // usermods required new parameters; need to wait for strip to be initialised #4752
+  if (needsCfgSave) serializeConfig(); // usermods required new parameters; need to wait for strip to be initialised #4752
 
   if (strcmp(multiWiFi[0].clientSSID, DEFAULT_CLIENT_SSID) == 0)
     showWelcomePage = true;