error TS2745: This JSX tag's 'children' prop expects type 'never' which requires multiple children, but only a single child was provided.

[Sandeep-FED]

I’ve recently started seeing this error when trying to use Fluent UI v9 with SPFx v1.20 and SPFx v1.21.1.
I’ve tried both older and newer Fluent UI v9 package versions, but the issue persists.

Has anyone else experienced this recently? Is something currently broken with Fluent UI v9 in SPFx?

[migueleliasdiazr-cpu]

Hello, were you able to solve the problem? I'm experiencing the same error with spfx 1.21.1 and the entire development environment indicated by Microsoft. It seems that Fluent UI v9 is not being compatible with this latest version of spfx and its environment. I managed to make a trick to force the render, but it is not very useful since it loses the functionality of JSX and the tags.

public render(): void {
const element: React.ReactElement = React.createElement(
FluentProvider as any, { theme: webLightTheme }, React.createElement(Singlewebpartapp) );
ReactDom.render(element, this.domElement);
}

[tudorpopams]

Can you please create an issue with a reproducible environment where we can check it out? Thanks!