I'm getting this error after uploading this sketch "esp8266-fastled-webserver",

I’m getting this error after uploading this sketch “esp8266-fastled-webserver”, installed of the libraries from the github repo.
it compiles, connects to the webpage. i keep geeing the error that i am showing below.
Thanks!!!

881ae9f2548d9b22398b1e3375588ecb.png

Did you use the SPIFS filesystem transfer tool to get the server files on the esp8266 ? http://arduino-esp8266.readthedocs.io/en/latest/filesystem.html
I think this is documented on Jason’s Github

Thanks for the help!!! it is working again. I did not use the firmware.

I’ve found that sometimes, potentially when you (or I) do something wrong or unexpected while uploading a new sketch, it deletes the SPIFFS filesystem and I need to re-upload it. Sounds like what’s happened to you.

@Marc_MERLIN I think that is what happened. I actually deleted everything arduino and started from scratch. I hadn’t seen the that tutorial before