Issues installing gulp. How to solve the problem?

Question

Node.js

I downloaded the course on OpenCert, started studying and literally stopped at the 5th lesson, the essence of the problem: - it was necessary to install node.js downloaded the current version 14.11.0 (from the off site https://nodejs.org/en/ ), then in the D folder :\OpenCart\OpenServer\OpenServer\domains\polikom.loc opening the command line, checked if node.js was installed in the system with the command >npm -v
6.14.8
Then proceeded to install the \node_modules folder using the >npm command i

After installation: Warnings : 19
Errors: 1

Help solve the problem, unfortunately my initial level of training is not enough for an independent solution.

Error screenshots.

Answer 1

The old version of node-sass does not start under the new node.
Delete the line from the package.json file node-sass: 3.8.0(you may also need to delete the entire package-lock.json file)
then run the command in the console npm install -D node-sass
You will install version 4 of node-sass