Problems while integrating WebDAV to a ESP32 PICO V3 WiFi SD card

[aero4]

Hi @rostwolke !
I am trying to implement your ESPAsyncWebdav library onto my new Fysetc SD Wifi Card which has an integrated ESP32 PICO V3.
I used the source code from their repository and the ESPAsyncWebServer they suggested and applied your changes.
I then added the code lines from your simple example.
My modified SdWiFiBrowser.ino from the original Fysetc firware looks like this (everything else is stock):

#include <Arduino.h>
#include "sdControl.h"
#include "config.h"
#include "serial.h"
#include "network.h"
#include "FSWebServer.h"
#include <SPIFFS.h>

// NEW:
#include <DateTime.h>
#include <LittleFS.h>
#include <AsyncWebdav.h>
AsyncWebdav dav("/dav", LittleFS);
//----

void setup() {
  SERIAL_INIT(115200);
  SPIFFS.begin();
  sdcontrol.setup();
  network.start();

  // NEW:
  LittleFS.begin();
  server.addHandler(&dav);
  // ----

  server.begin(&SPIFFS);
}

void loop() {
  network.loop();
}

I used their batch file to upload the firmware onto the SD card.

The Problem I am facing now is, that WebDAV is not available and when using serial monitor to connect to the SD card I see the following output:

E (12022) esp_littlefs: ./components/esp_littlefs/src/littlefs/lfs.c:1225:error: Corrupted dir pair at {0x0, 0x1}
E (12025) esp_littlefs: mount failed,  (-84)
E (12029) esp_littlefs: Failed to initialize LittleFS

A similar error also occurs when uploading your simple.ino example...

What can cause that kind of problem? Did I miss something?

(I am not very familiar with ESP32)

Thanks for any help in advance!