Class 'REST_Controller' not found

[bdtaskrony]

When i setup this project and execute this (index.php/api/v1/invoices) API it shows this error
https://prnt.sc/1y4jzo8
and I also can't find the Rest_Controller in the whole project.

[madeindra]

@bdtaskrony Have you followed the steps to install dependency?

[bdtaskrony]

I did not install docker and I used it without docker in the local apache server. But in the whole file, I can not find the Rest_Controller. Please mention from where you extend this Rest_Controller?
https://prnt.sc/1y5570a

[madeindra]

Pardon me, but it's installing dependency, not docker.

This part, have you done it? Please make sure you have composer installed before running these commands.

Install dependency using script (recommended)

chmod +x ./install-dependency.sh
./install-dependency.sh

Install dependency manually (If you are unable to run the script)

cd financial
composer install
cd ..
cd order
composer install
cd ..
cd warehouse
composer install
cd ..

[madeindra]

The REST_Controller came from this dependency
https://github.com/chriskacerguis/codeigniter-restserver