Render to texture

Hi all,
i try to get live texture from current scene render and i use :

const renderTargetParameters = { minFilter: THREE.LinearFilter, magFilter: THREE.LinearFilter, format: THREE.RGBFormat };

let renderTarget = new THREE.WebGLRenderTarget(window.innerWidth, window.innerHeight, renderTargetParameters );

///// material to plane
let mat = new THREE.MeshBasicMaterial({
            color: 0xffffff,

function render()
  renderer.render( scene,camera );

and i have White screen with this warning
[.WebGL-00004E38002BBF00] GL_INVALID_OPERATION: Feedback loop formed between Framebuffer and active Texture.

how i can fix it
help plz