LK4 Po upgrade do 1.13 Failed to read existing file

[mackerelpresence]

Hello, after upgrading the firmware from 1.10c to 1.13, unfortunately when trying to call LK4 via www it displays  Failed to read existing file.
Upgrading to 1.13 and Downgrading to 1.10c go through without a problem. LKtool also finds the device and displays the appropriate Firmware.
I restarted it to default with the button. It didn't change anything. I can control the relay with HA, but the rest of the data disappeared, so the software started and cleared itself. Only via www nothing is visible.
Any ideas?

deltarune

Edit:
I sent the device back to the manufacturer and it came back repaired.

If the relay does not respond, first check the configuration in the web interface – make sure the operating mode and switching conditions are set correctly. It is also worth verifying the firmware and physical connections. Let me know if it still does not work!