Как восстановить пропавшие страницы, которые верстал?

Question

[Rodion_Ka]

В чем проблема и как исправить?
Учусь работать в React. После попытки установки React-router-dom пропала страница, с которой работал, а в коде браузера появилось сообщение.
Failed to compile
./src/Pages/Products.js
Line 20: 'React' must be in scope when using JSX react/react-in-jsx-scope
Line 21: 'React' must be in scope when using JSX react/react-in-jsx-scope
Line 22: 'React' must be in scope when using JSX react/react-in-jsx-scope
Line 23: 'React' must be in scope when using JSX react/react-in-jsx-scope
Line 24: 'React' must be in scope when using JSX react/react-in-jsx-scope
Line 27: 'React' must be in scope when using JSX react/react-in-jsx-scope
Line 27: 'React' must be in scope when using JSX react/react-in-jsx-scope
Line 29: 'React' must be in scope when using JSX react/react-in-jsx-scope
Line 31: 'React' must be in scope when using JSX react/react-in-jsx-scope
Line 34: 'React' must be in scope when using JSX react/react-in-jsx-scope

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This error occurred during the build time and cannot be dismissed.

Comments

[Rodion_Ka]

Спасибо за понимание! Вопрос решился.