As the full error message indicates you will need to contact the site owner to resolve. Cloudflare provides a security service to websites. The configuration and mana management of that service is done by the website operator. Cloudflare cannot comment on why a request was blocked or change settings put in place by a website operator for obvious reasons.
Cloudflare is the tool the owner uses to provide security. It’s not Cloudflare that has configured it. You can try doing a whois lookup for an administrator contact or a Google search to determine how to contact them. But the settings and management of security settings are not done by Cloudflare itself nor can they modify those settings.