"Completed upload" with LittleFS. But "Not found: /" when try to connect

[Daniilslep]

Hello. I'm a complete newbie and I'm asking for help, please.

I installed everything according to the instructions. Everything seems to work as it should - it says that everything was successfully completed: Completed upload.

But when I try to connect to the board via local IP - it says "Not found: /".

My board is LOLIN(WEMOS) D1 R2 & mini
It connects to WiFi, everything is fine
Arduino IDE 2.3.6
Mac BigSur 11.7

I ask for help and advice. Thanks in advance