The Cloudflare human verification thing checks browser parameters that some extensions block or fake. Likely caused by "Canvas Blocker" if you use that. The fix is to add the specific Cloudflare subdomain this widget uses to the whitelist.
I had issues with that stupid widget too this week. Couldn't visit a specific website the whole time and reported it a few times and now it seems to work again. Kinda annoying because I'm pretty sure they annoy specifically VPN users too.