the theme is not touched at all but cannot be built due to compile errors:

node v16.14.2
npm 8.5.0


$ npm run build

> demo1@8.0.38 build
> react-scripts build

Creating an optimized production build...
=============

WARNING: You are currently running a version of TypeScript which is not officially supported by @typescript-eslint/typescript-estree.

You may find that it works just fine, or you may not.

SUPPORTED TYPESCRIPT VERSIONS: >=3.3.1 <4.5.0

YOUR TYPESCRIPT VERSION: 4.6.3

Please only submit bug reports when using the officially supported version.

=============
Failed to compile.

/home/sam/Downloads/react/react/demo1/src/_metronic/helpers/components/KTSVG.tsx
TypeScript error in /home/sam/Downloads/react/react/demo1/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("/home/sam/Downloads/react/react/demo1/node_modules/react-intl/node_modules/@types/react/index").ReactNode'.
Type '{}' is not assignable to type 'ReactNode'. TS2786

11 | return (
12 |
> 13 |
| ^
14 |
15 | )
16 | }