I tried to run demo1 & demo2 in React but after the "yarn install", I have this error (for both demos) :
TypeScript error in F:/myProject/metronic/src/_metronic/helpers/components/KTSVG.tsx(13,8): "SVG" cannot be used as a JSX component. Its instance type "InlineSVG" is not a valid JSX element. The types returned by "render()" are incompatible between these types. Type "React.ReactNode" is not assignable to type "import("F:/myProject/metronic/node_modules/react-intl/node_modules/@types/react/index").ReactNode". Type "{}" is not assignable to type "ReactNode". TS2786