ERR_QUIC_PROTOCOL_ERROR connection is not secure issue

Website, Application, Performance DNS & Network
1

What is the name of the domain?

diff-space.com

What is the error message?

ERR_QUIC_PROTOCOL_ERROR

What is the issue you’re encountering

connection not secure when proxied

What feature, service or problem is this related to?

DNS records

What are the steps to reproduce the issue?

Hi, I get a ERR_QUIC_PROTOCOL_ERROR error on diff-space.com when proxied. I re-created the DNS A records after deleting them some time ago. I am not sure if that is the cause of the issue. It seems that the edge certificate does not renew correctly. Any help is appreciated.

2

Hi there,

Your certificate is fine and from my end the connection is established with no issues.
Most likely your ISP is blocking HTTP/3 traffic (as some do).

I suggest browsing to Speed > Optimization > Protocol Optimization, disable HTTP/3 (with QUIC) and see if your issue is fixed. If it is, you can leave it like that or contact your ISP and inquire about why they are blocking H3 traffic.

Take care.

3

Hi, thanks for your response, the issue was fixed before by disabling and re-enabling Universal SSL after a few minutes. A new SSL certificate solved it. Thanks again.