This is my same issue and there are several posts on the forum that talk about this. Laptop runs the display on the integrated graphic card while OBS (and Streamlabs OBS) usually runs on the dedicated one. In order to capture something, OBS have to run on the same GPU of the "whatever is it" you are trying to capture. If is a screen recording, iGPU (integrated graphics) is fine, for gameplay use "game-capture".