Get missing Files at compilation

[NIKO-AT]

Hi,

thanks for this cool project!

I downloaded the project (Zip)
In platformio i compiled several project without any problems before trying this.

Compiling this project i get red lines: missing files liek Websockets.h, all html/files

what i am doing wrong or missed to do?
Thanks for advises!

[NIKO-AT]

compiling with default platform.ini works fine