Can't provision a Let’s Encrypt certificate

My site is stuck “Waiting on DNS propagation” for more than 48 hours, after that it show “We could not provision a Let’s Encrypt certificate for your custom domain”, I checked the troubleshooting guide but still can’t find the cause. Please help me.

My netlify site name is: stalwart-macaron-5b333f.netlify.app
My custom domain is: taxidongthap.pro

After I post this issue, I tried flushing the Google DNS Cache and it worked :sweat_smile: