Problems setting up the ESP32 S2 mini

[MarvinOstwald]

I bought an ESP32 s2 mini and tried to flash it with the https://flasher.bitronics.store/ page (also set it to flash mode).
But I always get these errors:

Starting flash process...

Error connecting to chip: Error: Timeout
Fetching: github-assets/nerdminer-prerelease-V1.7.0/ESP32-S2-mini-wemos_bootloader.bin
Fetched: bootloader.bin
Fetching: github-assets/nerdminer-prerelease-V1.7.0/ESP32-S2-mini-wemos_partitions.bin
Fetched: partitions.bin
Fetching: github-assets/nerdminer-prerelease-V1.7.0/boot_app0.bin
Fetched: boot_app0.bin
Fetching: github-assets/nerdminer-prerelease-V1.7.0/ESP32-S2-mini-wemos_firmware.bin
Fetched: firmware.bin
Flashing failed: Error: Timeout