Fork getting ready development environment

[Angelbe]

Hello,

We have made a fork from your branch, we want to introduce a vertical slide to the library but we are unable to start the development environment.

After the clone we do "npm i" and we try the next build, but it gives an error:
npm run build.log

Also we tried the npm run dev but in the screen we only see "internal server error".

Finally in the npm run start it also gives and error but i think is because the build failed:
npm run start.log

If you could help us understand what we are missing we will would be grateful.

Attentively
Angelbe

[TotallWAR]

Could you realise vertical slide?