Can't get past the Cloudflare "Performing security verification" page

I have an Acer Chromebook Plus 514. I've never had an issue with any Cloudflare verification pages, until now. Starting a few days ago I can't get past ANY "Performing security verification" pages. It just gets hung up and spins forever.

I tried Incognito Mode. I cleared my browser data -- cleared my cache and cookies for "All time." No luck.

I don't have any ad-blocker extensions. I don't use a VPN. My system clock has the correct date and time. Internet speed is around 300 Mbps on AT&T Fiber.

Note: I *can* get past this page on my phone, which is using the same wifi as my Chromebook.

Anyone know what might be wrong? Any way to fix this? Also, why might this suddenly start happening after working correctly for almost 2 years?

Thanks!

https://preview.redd.it/c134kjxqr3nh1.jpg?width=651&format=pjpg&auto=webp&s=b09aa0eb310419357117e7a652154fb5219d87e8