Local monitor gives SELECTION_EMPTY error but cloud monitoring is working just fine

I’m new and just figuring things out.

My monitors in the cloud work but those I’ve attempted to monitor locally give me the SELECTION_EMPTY error. I’ve tried Firefox, Chrome and the Distill desktop app and all return the same error.

I’ve extended the time in Config to up to 20 seconds. I’ve switched “dynamic” in Config to both true and then false. I’ve disabled my browsers’ ad blockers. There is no login for what I’m trying to monitor and the portion I’m trying to monitor has not disappeared (I only uploaded these last night).

What is blocking me from performing monitors locally? Could it be a browser configuration?