Some visitors getting ERR_QUIC_PROTOCOL_ERROR

Hey guys, I have a website hosted with FastComet and uses Cloudflare DNS. Some visitors are reporting getting a ERR_QUIC_PROTOCOL_ERROR, however, these same visitors can access other websites on the Internet just fine, so I think it’s not as simple as a chrome issue. I’ve done a bit of research and it could be related to SSL certificates, UDP port 443 and some other things.
Any ideas on what can be done?

Note: I am already aware of the following steps:

1. Open a new tab in Chrome
2. Enter chrome://flags/ into the address bar
3. Locate Experimental QUIC protocol
4. Using the drop-down menu, select Disable
5. Restart Chrome

And they are not feasible steps to be providing to my visitors. Other solutions please.

Thanks!

Have you tried turning QUIC off in the network tab to test?

Yes, I have. Unfortunately that didn’t work.

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