The CSP allows Cloudflare Web Analytics (browser check, WS-Q task 3): script-src https://static.cloudflareinsights.com loads the beacon Cloudflare injects at the edge, connect-src https://cloudflareinsights.com is where it reports. The network's privacy text already says Cloudflare may measure performance, and Live and Tools allow it; here the policy blocked it and every page view logged a CSP error.

ddiff --git a/server/index.js b/server/index.js
iindex 938255da..a2f4ea07 100644
---- a/server/index.js
++++ b/server/index.js
@@@ -127,7 +127,9 @@ app.use(helmet({
      contentSecurityPolicy: {
          directives: {
              defaultSrc: ["'self'"],
--            scriptSrc: ["'self'", "'unsafe-inline'", "https://openvibe.network", "https://openvibe.live", "cdnjs.cloudflare.com", "cdn.jsdelivr.net", "fonts.googleapis.com"],
++            // Cloudflare Web Analytics: Cloudflare injects its beacon at the edge and the privacy text says it may
++            // measure performance; script-src loads the beacon, connect-src is where it reports.
++            scriptSrc: ["'self'", "'unsafe-inline'", "https://openvibe.network", "https://openvibe.live", "cdnjs.cloudflare.com", "cdn.jsdelivr.net", "fonts.googleapis.com", "https://static.cloudflareinsights.com"],
              styleSrc: ["'self'", "'unsafe-inline'", "cdnjs.cloudflare.com", "fonts.googleapis.com", "fonts.gstatic.com"],
              fontSrc: ["'self'", "fonts.gstatic.com", "cdnjs.cloudflare.com"],
              imgSrc: ["'self'", "data:", "blob:"],
@@@ -140,6 +142,7 @@ app.use(helmet({
                  "https://openvibe.media",
                  "https://openvibe.community",
                  "https://openvibe.blog",
++                "https://cloudflareinsights.com", // Cloudflare Web Analytics reports here (see script-src)
              ],
              frameSrc: ["'none'"],
              scriptSrcAttr: ["'unsafe-inline'"],