524 timeout and PayPal Express plugin

I am getting a 524 timeout after the PayPal Express plugin is completed and sending the user back to outfrontmotorsports.com outfrontmotorsports.com - [15/Apr/2021:18:19:30 +0000] “GET /.well-known/pki-validation/ca3-b8966264d23f459ab511c6351a5aed88.txt HTTP/1.1” 404 19316 “-” “Digicert DCV” | - | - - 0.001 - 0 NC:000000 UP:-

2021-04-15 14:01:47.804350 [Thu Apr 15 14:01:47.804275 2021] [:warn] [pid 6270] [client] Timeout waiting for output from CGI script /home/u10-agi0ir4tqcb5/www/outfrontmotorsports.com/public_html/index.php, referer: My Cart - Outfront Motorsports

2021-04-15 16:19:44 UTC [nginx][error] 8327#0: *1740113 openat() “/home/u10-agi0ir4tqcb5/www/outfrontmotorsports.com/public_html/.well-known/pki-validation/ca3-b8966264d23f459ab511c6351a5aed88.txt” failed (2: No such file or directory), client:, server: outfrontmotorsports.com, request: “GET /.well-known/pki-validation/ca3-b8966264d23f459ab511c6351a5aed88.txt HTTP/1.1”, host: “outfrontmotorsports.com

It seems that the SSL validation is failing.

Can anyone help me figure this out?

Error 524 indicates that Cloudflare successfully connected to the origin web server, but the origin did not provide an HTTP response before the default 100 second connection timed out.

Enterprise customers can increase the 524 timeout up to 600 seconds.

Resolution Contact your hosting provider to exclude the following common causes at your origin web server:

  • A long-running process on the origin web server.
  • An overloaded origin web server.

Logging request response time at your origin web server helps identify the cause of resource slowness. Contact your hosting provider or site administrator for assistance in adjusting log formats or search for related logging documentation for your brand of web server such as Apache or Nginx.

If you regularly run HTTP requests that take over 100 seconds to complete (for example large data exports), move those processes behind a subdomain not proxied (grey clouded) in the Cloudflare DNS app.

If error 524 occurs for a domain using Cloudflare Railgun, ensure the lan.timeout is set higher than the default of 30 seconds and restart the railgun service.

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