React 19 compatibility issue – element.ref access error in SmartClient ReactComponent

[Hirn]

After upgrading to React 19, we are encountering a runtime issue inside SmartClient React integration.

The error appears when calling:

const button = this.loadButtonRef.current?.getSCComponent();

Error message

Accessing element.ref was removed in React 19. ref is now a regular prop.
It will be removed from the JSX Element type in a future release.

Stack trace

ReactComponent.js:261
ReactComponent.js:326
ReactComponent.js:328
ReactComponent.js:218
ReactComponent.js:66
<ToolStrip>
render OnlineUsers.js:115

Version v13.1p_2026-03-13/Pro Deployment (2026-03-13)