Failed to communicate with QUIC.cloud server

Hi,

I have a similar problem as described in many topics regarding QUIC.cloud connection and errors when trying to enable them, but unfortunately didn’t find any solution in those topis, therefore I’m opening a new topic. 

Basically I can not enable QUIC.cloud services. I’m getting following message as response, when trying to enable it:

Failed to communicate with QUIC.cloud server: Unknown error: unknown [server] https://wpapi.quic.cloud [service] tool/wp_rest_echo
QUIC.cloud’s access to your WP REST API seems to be blocked.

Here is a debug log: https://pastebin.ubuntu.com/p/PTsH63GRck/

I’ve also submitted report:

Last Report Number: FZVGXIYA
Last Report Date: 10/16/2025 17:29:24

Please help how to solve this issue.

The page I need help with: [log in to see the link]